Remove unused variable

src/vs/workbench/parts/comments/electron-browser/commentsEditorContribution.ts

@@ -17,7 +17,7 @@ import { EmbeddedCodeEditorWidget } from 'vs/editor/browser/widget/embeddedCodeE
 import { IEditorContribution } from 'vs/editor/common/editorCommon';
 import { IRange } from 'vs/editor/common/core/range';
 import * as modes from 'vs/editor/common/modes';
-import { peekViewEditorBackground, peekViewResultsBackground, peekViewResultsSelectionBackground, peekViewTitleBackground } from 'vs/editor/contrib/referenceSearch/referencesWidget';
+import { peekViewResultsBackground, peekViewResultsSelectionBackground, peekViewTitleBackground } from 'vs/editor/contrib/referenceSearch/referencesWidget';
 import { IContextKey, IContextKeyService, RawContextKey } from 'vs/platform/contextkey/common/contextkey';
 import { ServicesAccessor, IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
 import { KeybindingsRegistry, KeybindingWeight } from 'vs/platform/keybinding/common/keybindingsRegistry';