Simplify cache IDs and keys.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6954047

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@6914 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu.gypi b/gpu.gypi
index 7d3c0f2..9bfe572 100644
--- a/gpu.gypi
+++ b/gpu.gypi
@@ -10,7 +10,6 @@
     'gr_sources': [
       '<(skia_include_path)/gpu/GrAARectRenderer.h',
       '<(skia_include_path)/gpu/GrBackendEffectFactory.h',
-      '<(skia_include_path)/gpu/GrCacheID.h',
       '<(skia_include_path)/gpu/GrClipData.h',
       '<(skia_include_path)/gpu/GrColor.h',
       '<(skia_include_path)/gpu/GrConfig.h',