Revert of Enable stencil clipping in mixed sampled render targets

src/gpu/gl/GrGLRenderTarget.h

Index: src/gpu/gl/GrGLRenderTarget.h
diff --git a/src/gpu/gl/GrGLRenderTarget.h b/src/gpu/gl/GrGLRenderTarget.h
index ce04ae017dca79981746d66730e53254c6286b1b..d1365efd420c10af802bd173fd534a4d443871cd 100644
--- a/src/gpu/gl/GrGLRenderTarget.h
+++ b/src/gpu/gl/GrGLRenderTarget.h
@@ -70,21 +70,6 @@
     // components seperately.
     void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const override;
 
-    /**
-     * @return true if sample locations colocated at pixel center have been set for this
-     *         render target.  Requires support for NV_sample_locations.
-     */
-    bool usesColocatedSampleLocations() const {
-        return fUsesColocatedSampleLocations;
-    }
-
-    /**
-     * Flag render target as using or not using sample locations colocated at pixel center.
-     */
-    void flagAsUsingColocatedSampleLocations(bool useColocatedSampleLocations) {
-        fUsesColocatedSampleLocations = useColocatedSampleLocations;
-    }
-
 protected:
     // The public constructor registers this object with the cache. However, only the most derived
     // class should register with the cache. This constructor does not do the registration and
@@ -131,10 +116,6 @@
     // release zero out the IDs and the cache needs to know the size even after those actions.
     size_t      fGpuMemorySize;
 
-    // True if sample locations colocated at pixel center are currently in use, false if default
-    // sample locations are currently in use.
-    bool        fUsesColocatedSampleLocations;
-
     typedef GrRenderTarget INHERITED;
 };