message: Delete unused code & finalize migration
diff: import * as vscode from "vscode";
  -import { xxxnew_RefactoringActionProvider } from "./action-providers";
  +import { RefactoringActionProvider } from "./action-providers";
  import addBracesToArrowFunction from "./refactorings/add-braces-to-arrow-function";
  import bubbleUpIfStatement from "./refactorings/bubble-up-if-statement";
  @@ -81,7 +81,7 @@ export function activate(context: vscode.ExtensionContext) {
  SUPPORTED_LANGUAGES.forEach(language => {
  vscode.languages.registerCodeActionsProvider(
  language,
  - new xxxnew_RefactoringActionProvider([
  + new RefactoringActionProvider([
  addBracesToArrowFunction,
  bubbleUpIfStatement,
  convertForToForeach,
  