[CQ] Unnecessary code cleanup (#8080)

Addressed/removed unnecessary code in the form of:

* redundant suppressions
* redundant throws
* redundant casts
* unused imports
* redundant `toString()`, `substring(..)` calls
* unnecessary `default` branches
* explicit types where `<>` will do
* stream API call chains where `toList()` is enough

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- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] All existing and new tests are passing.

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on [Discord].

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Author: pq

flutter-idea/src/io/flutter/actions/FlutterBuildActionGroup.java

@@ -47,11 +47,9 @@ public void processTerminated(@NotNull ProcessEvent event) {
     };
     final Module module = pubRoot.getModule(project);
     if (module != null) {
-      //noinspection ConstantConditions
       sdk.flutterBuild(pubRoot, buildType.type).startInModuleConsole(module, pubRoot::refresh, processAdapter);
     }
     else {
-      //noinspection ConstantConditions
       final ColoredProcessHandler processHandler = sdk.flutterBuild(pubRoot, buildType.type).startInConsole(project);
       if (processHandler == null) {
         progressHelper.done();

flutter-idea/src/io/flutter/devtools/DevToolsUtils.java

@@ -15,8 +15,6 @@
 import org.dartlang.vm.service.VmServiceListener;
 import org.jetbrains.annotations.NotNull;
 
-import org.dartlang.vm.service.element.Event;
-
 import com.google.gson.JsonObject;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.vfs.LocalFileSystem;

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

@@ -95,7 +95,7 @@ public List<EditorEx> getActiveDartEditors() {
     for (FileEditor fileEditor : editors) {
       if (!(fileEditor instanceof TextEditor textEditor)) continue;
       final Editor editor = textEditor.getEditor();
-      if (editor instanceof EditorEx && !editor.isDisposed() && FlutterUtils.isDartFile(((EditorEx)editor).getVirtualFile())) {
+      if (editor instanceof EditorEx && !editor.isDisposed() && FlutterUtils.isDartFile(editor.getVirtualFile())) {
         dartEditors.add((EditorEx)editor);
       }
     }

flutter-idea/src/io/flutter/font/FontPreviewProcessor.java

@@ -576,7 +576,7 @@ public void addClasses(@NotNull String packageName, @NotNull String filePath, @N
       classesToAnalyze.addAll(
         names.stream()
           .map((each) -> new ClassInfo(packageName, filePath, each))
-          .collect(Collectors.toList()));
+          .toList());
     }
 
     void addFilesToRewrite(@NotNull String packageName, @NotNull Collection<VirtualFile> files) {
@@ -588,7 +588,7 @@ void addFilesToRewrite(@NotNull String packageName, @NotNull Collection<VirtualF
             return !(packageIndex < 0 || isInSdk(path));
           })
           .map((each) -> new FileInfo(packageName, each.getPath(), each))
-          .collect(Collectors.toList()));
+          .toList());
     }
   }
 

flutter-idea/src/io/flutter/jxbrowser/EmbeddedJxBrowser.java

@@ -219,7 +219,6 @@ public Logger logger() {
       case MISSING_PLATFORM_FILES -> "JX Browser platform files are missing";
       case CLASS_LOAD_FAILED -> "JX Browser class load failed";
       case CLASS_NOT_FOUND -> "JX Browser class not found";
-      default -> null;
     };
 
   }

flutter-idea/src/io/flutter/run/FlutterConfigurationEditorForm.java

@@ -43,7 +43,7 @@ protected void resetEditorFrom(@NotNull final SdkRunConfig config) {
   }
 
   @Override
-  protected void applyEditorTo(@NotNull final SdkRunConfig config) throws ConfigurationException {
+  protected void applyEditorTo(@NotNull final SdkRunConfig config) {
     final SdkFields fields = new SdkFields();
     fields.setFilePath(StringUtil.nullize(FileUtil.toSystemIndependentName(myFileField.getText().trim()), true));
     fields.setBuildFlavor(StringUtil.nullize(myBuildFlavorField.getText().trim()));

flutter-idea/src/io/flutter/run/FlutterReloadManager.java

@@ -234,7 +234,7 @@ private void handleSaveAllNotification(@Nullable Editor editor) {
     if (file == null) {
       return;
     }
-    if (file.getPath().startsWith(configPath.toString())) {
+    if (file.getPath().startsWith(configPath)) {
       return; // Ignore changes to scratch files.
     }
     if (System.currentTimeMillis() - file.getTimeStamp() > 500) {

flutter-idea/src/io/flutter/run/bazel/FlutterBazelConfigurationEditorForm.java

@@ -43,7 +43,7 @@ protected void resetEditorFrom(@NotNull final BazelRunConfig configuration) {
   }
 
   @Override
-  protected void applyEditorTo(@NotNull final BazelRunConfig configuration) throws ConfigurationException {
+  protected void applyEditorTo(@NotNull final BazelRunConfig configuration) {
     String target = myTarget.getText().trim();
     final BazelFields fields = new BazelFields(
       StringUtil.nullize(target.endsWith("dart") ? FileUtil.toSystemIndependentName(target) : target, true),

flutter-idea/src/io/flutter/run/coverage/FlutterCoverageProgramRunner.java

@@ -62,7 +62,7 @@ public RunnerSettings createConfigurationData(@NotNull final ConfigurationInfoPr
   @Override
   @Nullable
   protected RunContentDescriptor doExecute(final @NotNull RunProfileState state,
-                                           final @NotNull ExecutionEnvironment env) throws ExecutionException {
+                                           final @NotNull ExecutionEnvironment env) {
     final RunContentDescriptor result = DefaultProgramRunnerKt.executeState(state, env, this);
     if (result == null) {
       return null;

flutter-idea/src/io/flutter/run/test/TestForm.java

@@ -9,7 +9,6 @@
 import com.intellij.openapi.options.ConfigurationException;
 import com.intellij.openapi.options.SettingsEditor;
 import com.intellij.openapi.project.Project;
-import com.intellij.openapi.ui.TextComponentAccessor;
 import com.intellij.openapi.ui.TextFieldWithBrowseButton;
 import com.intellij.ui.ListCellRendererWrapper;
 import io.flutter.run.test.TestFields.Scope;
@@ -96,12 +95,11 @@ protected void resetEditorFrom(@NotNull TestConfig config) {
   }
 
   @Override
-  protected void applyEditorTo(@NotNull TestConfig config) throws ConfigurationException {
+  protected void applyEditorTo(@NotNull TestConfig config) {
     final TestFields fields = switch (getScope()) {
       case NAME -> TestFields.forTestName(testName.getText(), testFile.getText());
       case FILE -> TestFields.forFile(testFile.getText());
       case DIRECTORY -> TestFields.forDir(testDir.getText());
-      default -> throw new ConfigurationException("unexpected scope: " + scope.getSelectedItem());
     };
     fields.setAdditionalArgs(additionalArgs.getText().trim());
     config.setFields(fields);