Revert of Add Gr*Proxy classes

include/core/SkTypes.h

Index: include/core/SkTypes.h
diff --git a/include/core/SkTypes.h b/include/core/SkTypes.h
index f99bb019498a5c15db390d668f34f67fb5811df9..f9d0c533d3348400899734772301319f046a80d7 100644
--- a/include/core/SkTypes.h
+++ b/include/core/SkTypes.h
@@ -442,15 +442,6 @@
     kYes = true
 };
 
-/**
- * Indicates whether a backing store needs to be an exact match or can be larger
- * than is strictly necessary
- */
-enum class SkBackingFit {
-    kApprox,
-    kExact
-};
-
 ///////////////////////////////////////////////////////////////////////////////
 
 /** Use to combine multiple bits in a bitmask in a type safe way.