Remove unused function

src/vs/base/common/parsers.ts

@@ -3,8 +3,6 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import * as Types from 'vs/base/common/types';
-
 export const enum ValidationState {
 	OK = 0,
 	Info = 1,
@@ -78,25 +76,4 @@ export abstract class Parser {
 	public fatal(message: string): void {
 		this._problemReporter.fatal(message);
 	}
-
-	protected static merge<T extends object>(destination: T, source: T, overwrite: boolean): void {
-		Object.keys(source).forEach((key: string) => {
-			const destValue = destination[key];
-			const sourceValue = source[key];
-			if (Types.isUndefined(sourceValue)) {
-				return;
-			}
-			if (Types.isUndefined(destValue)) {
-				destination[key] = sourceValue;
-			} else {
-				if (overwrite) {
-					if (Types.isObject(destValue) && Types.isObject(sourceValue)) {
-						this.merge(destValue, sourceValue, overwrite);
-					} else {
-						destination[key] = sourceValue;
-					}
-				}
-			}
-		});
-	}
 }
\ No newline at end of file