Make SkGraphics::Term a no-op, stop calling it.

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index c1097204c4d7ae40777793d4f51cf53321e3d807..e15c1a74dbb1b954f65ea91e547a59a733c28208 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -1525,18 +1525,6 @@ static const SkMaskGamma& cachedMaskGamma(SkScalar contrast, SkScalar paintGamma
     return *gMaskGamma;
 }
 
-/*static*/ void SkPaint::Term() {
-    SkAutoMutexAcquire ama(gMaskGammaCacheMutex);
-
-    SkSafeUnref(gLinearMaskGamma);
-    gLinearMaskGamma = nullptr;
-    SkSafeUnref(gMaskGamma);
-    gMaskGamma = nullptr;
-    SkDEBUGCODE(gContrast = SK_ScalarMin;)
-    SkDEBUGCODE(gPaintGamma = SK_ScalarMin;)
-    SkDEBUGCODE(gDeviceGamma = SK_ScalarMin;)
-}
-
 /**
  *  We ensure that the rec is self-consistent and efficient (where possible)
  */