Remove "use strict"

Closes #107

src/providers/Completion.ts

@@ -1,5 +1,3 @@
-'use strict';
-
 import * as vsc from 'vscode';
 import { XQueryCompleter, XQueryCompletionItem } from '../services/XQueryCompleter';
 

src/providers/Execution.ts

@@ -1,5 +1,3 @@
-'use strict';
-
 import * as vsc from 'vscode';
 import { ChildProcess } from '../services/ChildProcess';
 

src/providers/Formatting.ts

@@ -1,5 +1,3 @@
-'use strict';
-
 import * as vsc from 'vscode';
 import { RangeUtil } from '../utils/RangeUtil';
 import { XmlFormatter, IXmlFormatterOptions } from '../services/XmlFormatter';

src/providers/Linting.ts

@@ -1,5 +1,3 @@
-'use strict';
-
 import * as vsc from 'vscode';
 import { XQueryLinter, XQueryDiagnostic } from '../services/XQueryLinter';
 

src/providers/XPath.ts

@@ -1,5 +1,3 @@
-'use strict';
-
 import * as vsc from 'vscode';
 import * as ext from '../Extension';
 import { XPathEvaluator, EvaluatorResult, EvaluatorResultType } from '../services/XPathEvaluator';