remove extra files

core/base/RefCounter.cpp

@@ -1,48 +0,0 @@
-// Copyright (c) 2016-2018 Easy2D - Nomango
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-// 
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-#include "RefCounter.h"
-
-namespace easy2d
-{
-	RefCounter::RefCounter()
-		: ref_count_(0)
-	{
-	}
-
-	RefCounter::~RefCounter()
-	{
-	}
-
-	long RefCounter::Retain()
-	{
-		
-	}
-
-	long RefCounter::Release()
-	{
-		
-	}
-
-	long RefCounter::GetRefCount() const
-	{
-		return ref_count_;
-	}
-}