remove internal propReplace function not needed (#69)

Author: Chris Brody

lib/pbxProject.js

@@ -1491,20 +1491,6 @@ pbxProject.prototype.addTarget = function(name, type, subfolder) {
 
 };
 
-// helper recursive prop search+replace
-function propReplace(obj, prop, value) {
-    var o = {};
-    for (var p in obj) {
-        if (o.hasOwnProperty.call(obj, p)) {
-            if (typeof obj[p] == 'object' && !Array.isArray(obj[p])) {
-                propReplace(obj[p], prop, value);
-            } else if (p == prop) {
-                obj[p] = value;
-            }
-        }
-    }
-}
-
 // helper object creation functions
 function pbxBuildFileObj(file) {
     var obj = Object.create(null);