Remove the last vestiges of null-unsafety in flutter_tools. (flutter#164026)

The internal code using this was deleted in `cl/730558889`.

Author: matanlurey

packages/flutter_tools/lib/src/android/android_device.dart

@@ -617,7 +617,6 @@ class AndroidDevice extends Device {
       );
     }
 
-    final String dartVmFlags = computeDartVmFlags(debuggingOptions);
     final String? traceAllowlist = debuggingOptions.traceAllowlist;
     final String? traceSkiaAllowlist = debuggingOptions.traceSkiaAllowlist;
     final String? traceToFile = debuggingOptions.traceToFile;
@@ -684,7 +683,11 @@ class AndroidDevice extends Device {
           'disable-service-auth-codes',
           'true',
         ],
-        if (dartVmFlags.isNotEmpty) ...<String>['--es', 'dart-flags', dartVmFlags],
+        if (debuggingOptions.dartFlags.isNotEmpty) ...<String>[
+          '--es',
+          'dart-flags',
+          debuggingOptions.dartFlags,
+        ],
         if (debuggingOptions.useTestFonts) ...<String>['--ez', 'use-test-fonts', 'true'],
         if (debuggingOptions.verboseSystemLogs) ...<String>['--ez', 'verbose-logging', 'true'],
         if (userIdentifier != null) ...<String>['--user', userIdentifier],

packages/flutter_tools/lib/src/commands/attach.dart

@@ -85,7 +85,6 @@ class AttachCommand extends FlutterCommand {
     usesDartDefineOption();
     usesDeviceUserOption();
     addEnableExperimentation(hide: !verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     usesInitializeFromDillOption(hide: !verboseHelp);
     usesNativeAssetsOption(hide: !verboseHelp);
     argParser

packages/flutter_tools/lib/src/commands/build_aar.dart

@@ -48,7 +48,6 @@ class BuildAarCommand extends BuildSubCommand {
     usesDartDefineOption();
     usesExtraDartFlagOptions(verboseHelp: verboseHelp);
     usesTrackWidgetCreation(verboseHelp: false);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     addEnableExperimentation(hide: !verboseHelp);
     addAndroidSpecificBuildOptions(hide: !verboseHelp);
     argParser.addMultiOption(

packages/flutter_tools/lib/src/commands/build_apk.dart

@@ -31,7 +31,6 @@ class BuildApkCommand extends BuildSubCommand {
     usesExtraDartFlagOptions(verboseHelp: verboseHelp);
     addEnableExperimentation(hide: !verboseHelp);
     addBuildPerformanceFile(hide: !verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     usesAnalyzeSizeFlag();
     addAndroidSpecificBuildOptions(hide: !verboseHelp);
     addIgnoreDeprecationOption();

packages/flutter_tools/lib/src/commands/build_appbundle.dart

@@ -34,7 +34,6 @@ class BuildAppBundleCommand extends BuildSubCommand {
     usesExtraDartFlagOptions(verboseHelp: verboseHelp);
     addBuildPerformanceFile(hide: !verboseHelp);
     usesTrackWidgetCreation(verboseHelp: verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     addEnableExperimentation(hide: !verboseHelp);
     usesAnalyzeSizeFlag();
     addAndroidSpecificBuildOptions(hide: !verboseHelp);

packages/flutter_tools/lib/src/commands/build_ios.dart

@@ -676,7 +676,6 @@ abstract class _BuildIOSSubCommand extends BuildSubCommand {
     usesExtraDartFlagOptions(verboseHelp: verboseHelp);
     addEnableExperimentation(hide: !verboseHelp);
     addBuildPerformanceFile(hide: !verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     usesAnalyzeSizeFlag();
     argParser.addFlag(
       'codesign',

packages/flutter_tools/lib/src/commands/build_ios_framework.dart

@@ -45,7 +45,6 @@ abstract class BuildFrameworkCommand extends BuildSubCommand {
     addSplitDebugInfoOption();
     addDartObfuscationOption();
     usesExtraDartFlagOptions(verboseHelp: verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     addEnableExperimentation(hide: !verboseHelp);
 
     argParser

packages/flutter_tools/lib/src/commands/build_web.dart

@@ -32,7 +32,6 @@ class BuildWebCommand extends BuildSubCommand {
     addBuildModeFlags(verboseHelp: verboseHelp);
     usesDartDefineOption();
     addEnableExperimentation(hide: !verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     addNativeNullAssertions();
 
     //

packages/flutter_tools/lib/src/commands/packages.dart

@@ -243,7 +243,6 @@ class PackagesGetCommand extends FlutterCommand {
     argParser.addFlag('enforce-lockfile');
     argParser.addFlag('precompile');
     argParser.addFlag('major-versions');
-    argParser.addFlag('null-safety');
     argParser.addFlag('example', defaultsTo: true);
     argParser.addOption('sdk');
     argParser.addOption('path');

packages/flutter_tools/lib/src/commands/run.dart

@@ -209,7 +209,6 @@ abstract class RunCommandBase extends FlutterCommand with DeviceBasedDevelopment
     usesIpv6Flag(verboseHelp: verboseHelp);
     usesPubOption();
     usesTrackWidgetCreation(verboseHelp: verboseHelp);
-    addNullSafetyModeOptions(hide: !verboseHelp);
     usesDeviceUserOption();
     usesDeviceTimeoutOption();
     usesDeviceConnectionOption();
@@ -360,7 +359,6 @@ abstract class RunCommandBase extends FlutterCommand with DeviceBasedDevelopment
             argParser.options.containsKey('fast-start') &&
             boolArg('fast-start') &&
             !runningWithPrebuiltApplication,
-        nullAssertions: boolArg('null-assertions'),
         nativeNullAssertions: boolArg('native-null-assertions'),
         enableImpeller: enableImpeller,
         enableVulkanValidation: enableVulkanValidation,