remove manager for future refactor

Author: e7mac

AndroidSDKCore/src/main/java/com/leanplum/internal/Request.java

@@ -1019,25 +1019,3 @@ public static String getResponseError(JSONObject response) {
     }
   }
 }
-
-class RequestManager
-{
-  private static RequestManager single_instance = null;
-
-  // variable of type String
-  public String s;
-
-  // private constructor restricted to this class itself
-  private RequestManager() {
-    s = "Hello I am a string part of Singleton class";
-  }
-
-  // static method to create instance of Singleton class
-  public static RequestManager getInstance()
-  {
-    if (single_instance == null)
-      single_instance = new RequestManager();
-
-    return single_instance;
-  }
-}