[CQ] remove dead Icon creation, outline service code (flutter#8226)

🧹 ✨ Some more dead code cleanup, removing:

* Inspector-orphaned icons, bounding box and custom icon support
* now dead fake active editor outline service and opportunistically a
handful of
* unused fields and methods

---

- [x] I’ve reviewed the contributor guide and applied the relevant
portions to this PR.

<details>
  <summary>Contribution guidelines:</summary><br>

- See our [contributor
guide]([https://github.com/dart-lang/sdk/blob/main/CONTRIBUTING.md](https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview)
for general expectations for PRs.
- Larger or significant changes should be discussed in an issue before
creating a PR.
- Dart contributions to our repos should follow the [Dart style
guide](https://dart.dev/guides/language/effective-dart) and use `dart
format`.
- Java and Kotlin contributions should strive to follow Java and Kotlin
best practices
([discussion](flutter#8098)).
</details>

Author: pq

flutter-idea/src/icons/FlutterIcons.java

@@ -9,53 +9,27 @@ private static Icon load(String path) {
     return IconLoader.getIcon(path, FlutterIcons.class);
   }
 
-  public static final Icon FlutterDefault = load("/icons/expui/flutter.svg");
   public static final Icon DevToolsDeepLinks = load("/icons/expui/deepLinks.svg");
   public static final Icon DevTools = load("/icons/expui/devTools.svg");
   public static final Icon DevToolsExtensions = load("/icons/expui/extensions.svg");
   public static final Icon DevToolsInspector = load("icons/expui/inspector.svg");
   public static final Icon PropertyEditor = load("/icons/expui/propertyEditor.svg");
-
-  public static final Icon Flutter_13_2x = load("/icons/[email protected]");
-  public static final Icon Flutter_64 = load("/icons/flutter_64.png");
-  public static final Icon Flutter_64_2x = load("/icons/[email protected]");
   public static final Icon Flutter = load("/icons/flutter.png");
   public static final Icon Flutter_2x = load("/icons/[email protected]");
-  public static final Icon Flutter_inspect = load("/icons/flutter_inspect.png");
   public static final Icon Flutter_test = load("/icons/flutter_test.png");
-  public static final Icon Flutter_badge = load("/icons/flutter_badge.png");
-
   public static final Icon Phone = load("/icons/phone.png");
-  public static final Icon Feedback = load("/icons/feedback.png");
   public static final Icon RefreshItems = load("/icons/refresh_items.png");
 
   public static final Icon Dart_16 = load("/icons/dart_16.svg");
 
   public static final Icon HotReload = load("/icons/hot-reload.png");
   public static final Icon HotRestart = load("/icons/hot-restart.png");
-
-  public static final Icon HotReloadRun = load("/icons/reload_run.png");
-  public static final Icon HotReloadDebug = load("/icons/reload_debug.png");
-
-  public static final Icon DebugBanner = load("/icons/debugBanner.png");
-  public static final Icon DebugPaint = load("/icons/debugPaint.png");
-  public static final Icon RepaintRainbow = load("/icons/repaintRainbow.png");
-
   public static final Icon BazelRun = load("/icons/bazel_run.png");
 
   public static final Icon CustomClass = load("/icons/custom/class.png");
   public static final Icon CustomClassAbstract = load("/icons/custom/class_abstract.png");
-  public static final Icon CustomFields = load("/icons/custom/fields.png");
-  public static final Icon CustomInterface = load("/icons/custom/interface.png");
   public static final Icon CustomMethod = load("/icons/custom/method.png");
   public static final Icon CustomMethodAbstract = load("/icons/custom/method_abstract.png");
-  public static final Icon CustomProperty = load("/icons/custom/property.png");
   public static final Icon CustomInfo = load("/icons/custom/info.png");
-
-  public static final Icon AndroidStudioNewProject = load("/icons/template_new_project.png");
-  public static final Icon AndroidStudioNewPackage = load("/icons/template_new_package.png");
-  public static final Icon AndroidStudioNewPlugin = load("/icons/template_new_plugin.png");
-  public static final Icon AndroidStudioNewModule = load("/icons/template_new_module.png");
-
   public static final Icon AttachDebugger = load("/icons/attachDebugger.png");
 }

flutter-idea/src/io/flutter/ProjectOpenActivity.java

@@ -115,17 +115,11 @@ private static void excludeAndroidFrameworkDetector(@NotNull Project project) {
   }
 
   private static class PackagesOutOfDateNotification extends Notification {
-    @NotNull private final Project myProject;
-    @NotNull private final PubRoot myRoot;
-
     public PackagesOutOfDateNotification(@NotNull Project project, @NotNull PubRoot root) {
       super("Flutter Packages", "The pubspec.yaml file has been modified since " +
                                 "the last time 'flutter pub get' was run.", NotificationType.INFORMATION);
       setIcon(FlutterIcons.Flutter);
 
-      myProject = project;
-      myRoot = root;
-
       //noinspection DialogTitleCapitalization
       addAction(new AnAction("Run 'flutter pub get'") {
         @Override

flutter-idea/src/io/flutter/dart/FlutterRequestUtilities.java

@@ -28,7 +28,6 @@ public class FlutterRequestUtilities {
   private static final String OFFSET = "offset";
   private static final String SUBSCRIPTIONS = "subscriptions";
 
-  private static final String METHOD_FLUTTER_GET_CHANGE_ADD_FOR_DESIGN_TIME_CONSTRUCTOR = "flutter.getChangeAddForDesignTimeConstructor";
   private static final String METHOD_FLUTTER_SET_SUBSCRIPTIONS = "flutter.setSubscriptions";
   private static final String METHOD_FLUTTER_GET_WIDGET_DESCRIPTION = "flutter.getWidgetDescription";
   private static final String METHOD_FLUTTER_SET_WIDGET_PROPERTY_VALUE = "flutter.setWidgetPropertyValue";

flutter-idea/src/io/flutter/editor/ColorPickerProvider.java

@@ -5,16 +5,13 @@
  */
 package io.flutter.editor;
 
-import com.intellij.openapi.extensions.ExtensionPointName;
 import com.intellij.openapi.ui.popup.Balloon;
 import org.jetbrains.annotations.Nullable;
 
 import javax.swing.*;
 import java.awt.*;
 
 public interface ColorPickerProvider {
-  ExtensionPointName<ColorPickerProvider> EP_NAME = ExtensionPointName.create("io.flutter.colorPickerProvider");
-
   interface ColorListener {
     void colorChanged(@Nullable Color var1, Object var2);
   }

flutter-idea/src/io/flutter/editor/FlutterIconRenderer.java

@@ -9,7 +9,6 @@
 import com.google.gson.JsonElement;
 import com.google.gson.JsonNull;
 import com.google.gson.JsonObject;
-import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.text.StringUtil;
 import io.flutter.run.daemon.FlutterApp;
 import io.flutter.utils.CustomIconMaker;
@@ -45,8 +44,6 @@
  * also available via the getValue() method.
  */
 public class DiagnosticsNode {
-  private static final @NotNull Logger LOG = Logger.getInstance(DiagnosticsNode.class);
-
   private static final CustomIconMaker iconMaker = new CustomIconMaker();
 
   private DiagnosticsNode parent;
@@ -141,18 +138,7 @@ public boolean getShowSeparator() {
   public String getDescription() {
     return getStringMember("description");
   }
-
-  /**
-   * Returns a transformed rect that describes the bounding box for an element
-   * <p>
-   */
-  public TransformedRect getTransformToRoot() {
-    if (!json.has("transformToRoot")) {
-      return null;
-    }
-    return new TransformedRect(json.getAsJsonObject("transformToRoot"));
-  }
-
+  
   /**
    * Priority level of the diagnostic used to control which diagnostics should
    * be shown and filtered.

flutter-idea/src/io/flutter/logging/DiagnosticsNode.java

@@ -31,7 +31,6 @@
  * That is, a directory containing (at a minimum) a pubspec.yaml file.
  */
 public class PubRoot {
-  public static final String ANALYSIS_OPTIONS_YAML = "analysis_options.yaml";
   public static final String DOT_DART_TOOL = ".dart_tool";
   public static final String DOT_PACKAGES = ".packages";
   public static final String PUBSPEC_YAML = "pubspec.yaml";
@@ -447,7 +446,7 @@ public Module getModule(@NotNull Project project) {
     }
     return ProjectRootManager.getInstance(project).getFileIndex().getModuleForFile(pubspec);
   }
-  
+
   @Override
   public String toString() {
     return "PubRoot(" + root.getName() + ")";

flutter-idea/src/io/flutter/logging/TransformedRect.java

@@ -6,9 +6,6 @@
 package io.flutter.run;
 
 import com.google.common.collect.ImmutableMap;
-import com.intellij.codeInsight.hint.HintManager;
-import com.intellij.codeInsight.hint.HintManagerImpl;
-import com.intellij.codeInsight.hint.HintUtil;
 import com.intellij.concurrency.JobScheduler;
 import com.intellij.execution.ExecutionException;
 import com.intellij.execution.configurations.GeneralCommandLine;
@@ -45,7 +42,6 @@
 import com.intellij.psi.PsiErrorElement;
 import com.intellij.psi.PsiFile;
 import com.intellij.psi.util.PsiTreeUtil;
-import com.intellij.ui.LightweightHint;
 import com.intellij.util.messages.MessageBusConnection;
 import com.intellij.util.ui.UIUtil;
 import com.jetbrains.lang.dart.ide.errorTreeView.DartProblemsView;
@@ -68,13 +64,11 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import javax.swing.*;
 import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Handle the mechanics of performing a hot reload on file save.
@@ -497,22 +491,4 @@ private boolean hasErrorsInFile(@NotNull Document document) {
     });
     return firstError != null;
   }
-
-  private LightweightHint showEditorHint(@NotNull Editor editor, String message, boolean isError) {
-    final AtomicReference<LightweightHint> ref = new AtomicReference<>();
-
-    OpenApiUtils.safeInvokeAndWait(() -> {
-      final JComponent component = isError
-                                   ? HintUtil.createErrorLabel(message)
-                                   : HintUtil.createInformationLabel(message);
-      final LightweightHint hint = new LightweightHint(component);
-      ref.set(hint);
-      HintManagerImpl.getInstanceImpl().showEditorHint(
-        hint, editor, HintManager.UNDER,
-        HintManager.HIDE_BY_ANY_KEY | HintManager.HIDE_BY_TEXT_CHANGE | HintManager.HIDE_BY_SCROLLING | HintManager.HIDE_BY_OTHER_HINT,
-        isError ? 0 : 3000, false);
-    });
-
-    return ref.get();
-  }
 }

flutter-idea/src/io/flutter/pub/PubRoot.java

@@ -22,7 +22,6 @@ public class FlutterSettings {
   private static final String verboseLoggingKey = "io.flutter.verboseLogging";
   private static final String formatCodeOnSaveKey = "io.flutter.formatCodeOnSave";
   private static final String organizeImportsOnSaveKey = "io.flutter.organizeImportsOnSave";
-  private static final String showOnlyWidgetsKey = "io.flutter.showOnlyWidgets";
   private static final String syncAndroidLibrariesKey = "io.flutter.syncAndroidLibraries";
   private static final String showStructuredErrorsKey = "io.flutter.showStructuredErrors";
   private static final String includeAllStackTracesKey = "io.flutter.includeAllStackTraces";