remove align16 calls in skhader context sizes. will handle this elsewhere as needed

src/core/SkEmptyShader.h

Index: src/core/SkEmptyShader.h
diff --git a/src/core/SkEmptyShader.h b/src/core/SkEmptyShader.h
index 42b61c52feffa9478817fe9edd212eb5a281d2da..528ceeabeea3fdda969e18745e13a064bd53dd81 100644
--- a/src/core/SkEmptyShader.h
+++ b/src/core/SkEmptyShader.h
@@ -27,7 +27,7 @@ protected:
     size_t onContextSize(const ContextRec&) const override {
         // Even though createContext returns nullptr we have to return a value of at least
         // sizeof(SkShader::Context) to satisfy SkSmallAllocator.
-        return SkAlign16(sizeof(SkShader::Context));
+        return sizeof(SkShader::Context);
     }
 
     SkShader::Context* onCreateContext(const ContextRec&, void*) const override {