linter: Remove infra for removed integration-style tests

Change-Id: I0e8d4db0914fb72d451f7fbea389e0bf8cd36886
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/399625
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Phil Quitslund <[email protected]>
Commit-Queue: Samuel Rawlins <[email protected]>

Author: srawlins

pkg/analyzer/lib/src/lint/io.dart

@@ -13,42 +13,9 @@ StringSink errorSink = stderr;
 /// A shared sink for standard out reporting.
 StringSink outSink = stdout;
 
-/// Collect all lintable files, recursively, under this [path] root, ignoring
-/// links.
-Iterable<File> collectFiles(String path) {
-  List<File> files = [];
-
-  var file = File(path);
-  if (file.existsSync()) {
-    files.add(file);
-  } else {
-    var directory = Directory(path);
-    if (directory.existsSync()) {
-      for (var entry
-          in directory.listSync(recursive: true, followLinks: false)) {
-        var relative = p.relative(entry.path, from: directory.path);
-
-        if (isLintable(entry) && !isInHiddenDir(relative)) {
-          files.add(entry as File);
-        }
-      }
-    }
-  }
-
-  return files;
-}
-
 /// Returns `true` if this [entry] is a Dart file.
 bool isDartFile(FileSystemEntity entry) => isDartFileName(entry.path);
 
-/// Returns `true` if this relative path is a hidden directory.
-bool isInHiddenDir(String relative) =>
-    p.split(relative).any((part) => part.startsWith("."));
-
-/// Returns `true` if this relative path is a hidden directory.
-bool isLintable(FileSystemEntity file) =>
-    file is File && (isDartFile(file) || isPubspecFile(file));
-
 /// Returns `true` if this [entry] is a pubspec file.
 bool isPubspecFile(FileSystemEntity entry) =>
     isPubspecFileName(p.basename(entry.path));

pkg/analyzer/test/src/lint/io_test.dart

@@ -5,15 +5,13 @@
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'config_test.dart' as config;
-import 'io_test.dart' as io;
 import 'lint_rule_test.dart' as lint_rule;
 import 'linter/test_all.dart' as linter;
 import 'pub_test.dart' as pub;
 
 main() {
   defineReflectiveSuite(() {
     config.main();
-    io.main();
     lint_rule.main();
     linter.main();
     pub.main();