Remove use stricts from ts files

This is implicit for modules

vim-sample/src/operators.ts

@@ -2,7 +2,6 @@
  *  Copyright (c) Microsoft Corporation. All rights reserved.
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
-'use strict';
 
 import { Position, Selection, Range, TextDocument, TextEditor, TextEditorRevealType } from 'vscode';
 import { Motion, Motions } from './motions';