Stop overloading internal_dispose in SkTextBlob and SkData

src/core/SkTextBlob.cpp

Index: src/core/SkTextBlob.cpp
diff --git a/src/core/SkTextBlob.cpp b/src/core/SkTextBlob.cpp
index f298b547b737dbf8cab1dd4b44f19a70fe7593b9..0b81cb6572bbe288e284d08c49e7e89c62cca6bf 100644
--- a/src/core/SkTextBlob.cpp
+++ b/src/core/SkTextBlob.cpp
@@ -122,13 +122,6 @@ SkTextBlob::~SkTextBlob() {
     }
 }
 
-void SkTextBlob::internal_dispose() const {
-    // SkTextBlobs use externally-managed storage.
-    this->internal_dispose_restore_refcnt_to_1();
-    this->~SkTextBlob();
-    sk_free(const_cast<SkTextBlob*>(this));
-}
-
 uint32_t SkTextBlob::uniqueID() const {
     static int32_t  gTextBlobGenerationID; // = 0;