diff --git a/utils/utils.android.ts b/utils/utils.android.ts
deleted file mode 100644
index 3acfe9f2f..000000000
--- a/utils/utils.android.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-export class Collections {
-    public static stringArrayToStringSet(str: string[]): any {
-        var hashSet = new java.util.HashSet();
-        if ("undefined" != typeof str) {
-            for (var element in str) {
-                hashSet.add('' + str[element]);
-            }
-        }
-        return hashSet;
-    }
-
-    public static stringSetToStringArray(stringSet: any): string[] {
-        var arr = [];
-        if ("undefined" != typeof stringSet) {
-            var it = stringSet.iterator();
-            while (it.hasNext()) {
-                var element = '' + it.next();
-                arr.push(element);
-            }
-        }
-
-        return arr;
-    }
-}
\ No newline at end of file
diff --git a/utils/utils.d.ts b/utils/utils.d.ts
deleted file mode 100644
index 89391242a..000000000
--- a/utils/utils.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-/**
-  * Timer functions.
-  */
-export declare function setTimeout(callback: Function, milliseconds?: number): number;
-export declare function clearTimeout(id: number): void;
-export declare function setInterval(callback: Function, milliseconds?: number): number;
-export declare function clearInterval(id: number): void;
\ No newline at end of file
diff --git a/utils/utils.ios.ts b/utils/utils.ios.ts
deleted file mode 100644
index d355c3252..000000000
--- a/utils/utils.ios.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-export class Collections {
-    public static jsArrayToNSArray(str: string[]): any {
-        var arr = new Foundation.NSMutableArray();
-        if ("undefined" != typeof str) {
-            for (var element in str) {
-                arr.addObject(str[element]);
-            }
-        }
-        return arr;
-    }
-
-    public static nsArrayToJSArray(a: any): string[] {
-        var arr = [];
-        if ("undefined" != typeof a) {
-            for (var i = 0; i < a.count(); i++) {
-                arr.push(a.objectAtIndex(i));
-            }
-        }
-
-        return arr;
-    }
-}
\ No newline at end of file