SkTDynamicHash: remove need for Equals(const T&, const Key&) param.

src/core/SkPictureFlat.h

Index: src/core/SkPictureFlat.h
diff --git a/src/core/SkPictureFlat.h b/src/core/SkPictureFlat.h
index bd8f66cb7e4ab73c6ca0d05b7421a63ac8ed2f4e..f63b9c10a72495c1fe22758ae035c9e990cc621d 100644
--- a/src/core/SkPictureFlat.h
+++ b/src/core/SkPictureFlat.h
@@ -338,7 +338,6 @@ private:
     // For SkTDynamicHash.
     static const SkFlatData& Identity(const SkFlatData& flat) { return flat; }
     static uint32_t Hash(const SkFlatData& flat) { return flat.checksum(); }
-    static bool Equal(const SkFlatData& a, const SkFlatData& b) { return a == b; }
 
     void setIndex(int index) { fIndex = index; }
     uint8_t* data() { return (uint8_t*)this + sizeof(*this); }
@@ -564,8 +563,7 @@ private:
     SkTDArray<const SkFlatData*> fIndexedData;
 
     // For SkFlatData -> cached SkFlatData, which has index().
-    SkTDynamicHash<SkFlatData, SkFlatData,
-                   SkFlatData::Identity, SkFlatData::Hash, SkFlatData::Equal> fHash;
+    SkTDynamicHash<SkFlatData, SkFlatData, SkFlatData::Identity, SkFlatData::Hash> fHash;
 };
 
 typedef SkFlatDictionary<SkPaint, SkPaint::FlatteningTraits> SkPaintDictionary;