Cleanup: Remove GR_ARRAY_COUNT macro.

It is defined to SK_ARRAY_COUNT, and there are no uses of it.

Lets just use the SK_ variant.

BUG=None
TEST=None
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/691133003
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index 49397a5..9c68af2 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -70,11 +70,6 @@
 }
 
 /**
- *  Count elements in an array
- */
-#define GR_ARRAY_COUNT(array)  SK_ARRAY_COUNT(array)
-
-/**
  *  16.16 fixed point type
  */
 typedef int32_t GrFixed;