Revert of added support for PLS path rendering

src/gpu/GrDrawTarget.cpp

Index: src/gpu/GrDrawTarget.cpp
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrDrawTarget.cpp
index b9dc7945262056e753bf2b274d8573cef7ed6787..e2e188eb12cf131d0781ddbc019b7f9d1372a784 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrDrawTarget.cpp
@@ -20,7 +20,6 @@
 #include "GrSurfacePriv.h"
 #include "GrTexture.h"
 #include "GrVertexBuffer.h"
-#include "gl/GrGLRenderTarget.h"
 
 #include "SkStrokeRec.h"
 
@@ -213,8 +212,6 @@ void GrDrawTarget::drawBatches(GrBatchFlushState* flushState) {
         }
         fBatches[i]->draw(flushState);
     }
-
-    fGpu->performFlushWorkaround();
 }
 
 void GrDrawTarget::reset() {
@@ -490,31 +487,6 @@ bool GrDrawTarget::installPipelineInDrawBatch(const GrPipelineBuilder* pipelineB
     args.fCaps = this->caps();
     args.fScissor = scissor;
     batch->getPipelineOptimizations(&args.fOpts);
-    GrScissorState finalScissor;
-    if (args.fOpts.fOverrides.fUsePLSDstRead) {
-        GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
-        GrGLIRect viewport;
-        viewport.fLeft = 0;
-        viewport.fBottom = 0;
-        viewport.fWidth = rt->width();
-        viewport.fHeight = rt->height();
-        SkIRect ibounds;
-        ibounds.fLeft = SkTPin(SkScalarFloorToInt(batch->bounds().fLeft), viewport.fLeft, 
-                              viewport.fWidth);
-        ibounds.fTop = SkTPin(SkScalarFloorToInt(batch->bounds().fTop), viewport.fBottom, 
-                             viewport.fHeight);
-        ibounds.fRight = SkTPin(SkScalarCeilToInt(batch->bounds().fRight), viewport.fLeft, 
-                               viewport.fWidth);
-        ibounds.fBottom = SkTPin(SkScalarCeilToInt(batch->bounds().fBottom), viewport.fBottom, 
-                                viewport.fHeight);
-        if (scissor != nullptr && scissor->enabled()) {
-            if (!ibounds.intersect(scissor->rect())) {
-                ibounds = scissor->rect();
-            }
-        }
-        finalScissor.set(ibounds);
-        args.fScissor = &finalScissor;
-    }
     args.fOpts.fColorPOI.completeCalculations(pipelineBuilder->fColorFragmentProcessors.begin(),
                                               pipelineBuilder->numColorFragmentProcessors());
     args.fOpts.fCoveragePOI.completeCalculations(