Minor code cleanup of Debug GL Interface

http://codereview.appspot.com/6032043/



git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@3690 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu.gyp b/gpu.gyp
index df8fb7b..026f3b9 100644
--- a/gpu.gyp
+++ b/gpu.gyp
@@ -302,7 +302,6 @@
 
         '../src/gpu/gl/debug/GrGLCreateDebugInterface.cpp',
         '../src/gpu/gl/debug/GrFakeRefObj.h',
-        '../src/gpu/gl/debug/GrFakeRefObj.cpp',
         '../src/gpu/gl/debug/GrBufferObj.h',
         '../src/gpu/gl/debug/GrBufferObj.cpp',
         '../src/gpu/gl/debug/GrFBBindableObj.h',