Revert of GrFP can express distance vector field req., program builder declares variable for it

src/gpu/GrPipeline.h

Index: src/gpu/GrPipeline.h
diff --git a/src/gpu/GrPipeline.h b/src/gpu/GrPipeline.h
index 1457dbc3f58120861a445237a978eb7bbcf60a78..5ec572d0ae199f42905366ff4238948d790264c7 100644
--- a/src/gpu/GrPipeline.h
+++ b/src/gpu/GrPipeline.h
@@ -160,9 +160,6 @@
     bool getAllowSRGBInputs() const {
         return SkToBool(fFlags & kAllowSRGBInputs_Flag);
     }
-    bool usesDistanceVectorField() const {
-        return SkToBool(fFlags & kUsesDistanceVectorField_Flag);
-    }
     bool hasStencilClip() const {
         return SkToBool(fFlags & kHasStencilClip_Flag);
     }
@@ -209,8 +206,7 @@
         kSnapVertices_Flag                  = 0x2,
         kDisableOutputConversionToSRGB_Flag = 0x4,
         kAllowSRGBInputs_Flag               = 0x8,
-        kUsesDistanceVectorField_Flag       = 0x10,
-        kHasStencilClip_Flag                = 0x20,
+        kHasStencilClip_Flag                = 0x10
     };
 
     typedef GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> RenderTarget;