Remove proxy as a string option ({ proxy: "/api" }), which wasn't working anyway

Author: SpaceK33z

lib/Server.js

@@ -124,16 +124,6 @@ function Server(compiler, options) {
 
 		proxy: function() {
 			if(options.proxy) {
-				/**
-				 * Assume a proxy configuration specified as:
-				 * proxy: 'a url'
-				 */
-				if(typeof options.proxy === "string") {
-					options.proxy = [{
-						context: options.proxy
-					}];
-				}
-
 				/**
 				 * Assume a proxy configuration specified as:
 				 * proxy: {