Revert of added support for PLS path rendering

src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp

Index: src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp
diff --git a/src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp b/src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp
index f97b8541d0b6dcf41fef56cc1537bf7b3a5cc7e4..90e20437e17ba4aeeb16546a078471c6158f1bad 100644
--- a/src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp
+++ b/src/gpu/glsl/GrGLSLFragmentShaderBuilder.cpp
@@ -7,7 +7,6 @@
 
 #include "GrGLSLFragmentShaderBuilder.h"
 #include "GrRenderTarget.h"
-#include "gl/GrGLGpu.h"
 #include "glsl/GrGLSL.h"
 #include "glsl/GrGLSLCaps.h"
 #include "glsl/GrGLSLProgramBuilder.h"
@@ -88,14 +87,6 @@ bool GrGLSLFragmentShaderBuilder::enableFeature(GLSLFeature feature) {
             }
             return true;
         }
-        case kPixelLocalStorage_GLSLFeature: {
-            if (fProgramBuilder->glslCaps()->pixelLocalStorageSize() <= 0) {
-                return false;
-            }
-            this->addFeature(1 << kPixelLocalStorage_GLSLFeature,
-                             "GL_EXT_shader_pixel_local_storage");
-            return true;
-        }
         default:
             SkFAIL("Unexpected GLSLFeature requested.");
             return false;
@@ -169,11 +160,6 @@ const char* GrGLSLFragmentShaderBuilder::fragmentPosition() {
 const char* GrGLSLFragmentShaderBuilder::dstColor() {
     fHasReadDstColor = true;
 
-    const char* override = fProgramBuilder->primitiveProcessor().getDestColorOverride();
-    if (override != nullptr) {
-        return override;
-    }
-
     const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps();
     if (glslCaps->fbFetchSupport()) {
         this->addFeature(1 << (GrGLSLFragmentShaderBuilder::kLastGLSLPrivateFeature + 1),
@@ -241,13 +227,6 @@ const char* GrGLSLFragmentShaderBuilder::getPrimaryColorOutputName() const {
     return fHasCustomColorOutput ? DeclaredColorOutputName() : "gl_FragColor";
 }
 
-void GrGLSLFragmentBuilder::declAppendf(const char* fmt, ...) {
-    va_list argp;
-    va_start(argp, fmt);
-    inputs().appendVAList(fmt, argp);
-    va_end(argp);    
-}
-
 const char* GrGLSLFragmentShaderBuilder::getSecondaryColorOutputName() const {
     const GrGLSLCaps& caps = *fProgramBuilder->glslCaps();
     return caps.mustDeclareFragmentShaderOutput() ? DeclaredSecondaryColorOutputName()