Remove unused SkRRectsGaussianEdgeMaskFilter #include

SkRRectsGaussianEdgeMaskFilter is going away in Skia (https://skia-review.googlesource.com/c/skia/+/121960 (rm SkRRectsGaussianEdgeMaskFilter)) but this usage needs to be cleaned up first

Test: does it compile?
Change-Id: I489123a32958ada2d27425d78b3abb2db2290ce8
diff --git a/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp b/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
index 6e7a5b3..6292a6c 100644
--- a/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
+++ b/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
@@ -20,7 +20,6 @@
 #include "SkiaPipeline.h"
 
 #include <SkPathOps.h>
-#include <SkRRectsGaussianEdgeMaskFilter.h>
 #include <SkShadowUtils.h>
 
 namespace android {