Revert of added support for PLS path rendering

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 6f194dcd6c4296ebaebb0b1ec5ba86f6329e6d43..63f1247962b0677475c01da0e1fc7dcf3b06a81d 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -134,8 +134,6 @@ public:
 
     void drawDebugWireRect(GrRenderTarget*, const SkIRect&, GrColor) override;
 
-    void performFlushWorkaround() override;
-
 private:
     GrGLGpu(GrGLContext* ctx, GrContext* context);
 
@@ -236,11 +234,6 @@ private:
                                       const SkIRect& srcRect,
                                       const SkIPoint& dstPoint);
 
-    void stampRectUsingProgram(GrGLuint program, const SkRect& bounds, GrGLint posXformUniform, 
-                               GrGLuint arrayBuffer);
-
-    void setupPixelLocalStorage(const DrawArgs& args);
-
     static bool BlendCoeffReferencesConstant(GrBlendCoeff coeff);
 
     class ProgramCache : public ::SkNoncopyable {
@@ -362,8 +355,6 @@ private:
     void createWireRectProgram();
     void createUnitRectBuffer();
 
-    void createPLSSetupProgram();
-
     // GL program-related state
     ProgramCache*               fProgramCache;
 
@@ -574,15 +565,6 @@ private:
         }
     }
 
-    struct {
-        GrGLuint    fProgram;
-        GrGLint     fPosXformUniform;
-        GrGLuint    fArrayBuffer;
-    } fPLSSetupProgram;
-
-    bool fHWPLSEnabled;
-    bool fPLSHasBeenUsed;
-
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };