Remove unused encodedString API on SkWriteBuffer/SkReadBuffer

include/core/SkWriteBuffer.h

Index: include/core/SkWriteBuffer.h
diff --git a/include/core/SkWriteBuffer.h b/include/core/SkWriteBuffer.h
index bd04dec0f94f8f4202e8d52c88456f36d4e11d39..1577ad04bc0d8a61f20a750442bb4bb12e7bfc6c 100644
--- a/include/core/SkWriteBuffer.h
+++ b/include/core/SkWriteBuffer.h
@@ -54,7 +54,6 @@ public:
     void writeUInt(uint32_t value);
     void write32(int32_t value);
     void writeString(const char* value);
-    void writeEncodedString(const void* value, size_t byteLength, SkPaint::TextEncoding encoding);
     void writeFunctionPtr(void* ptr) { fWriter.writePtr(ptr); }
 
     void writeFlattenable(const SkFlattenable* flattenable);