Remove unused encodedString API on SkWriteBuffer/SkReadBuffer

src/core/SkReadBuffer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkErrorInternals.h"
 #include "SkImage.h"
@@ skipping 99 matching lines @@
     SkASSERT(fReader.available() > 0);
     return *((uint8_t*) fReader.peek());
 }
 
 void SkReadBuffer::readString(SkString* string) {
     size_t len;
     const char* strContents = fReader.readString(&len);
     string->set(strContents, len);
 }
 
-void* SkReadBuffer::readEncodedString(size_t* length, SkPaint::TextEncoding encoding) {
-    SkDEBUGCODE(int32_t encodingType = ) fReader.readInt();
-    SkASSERT(encodingType == encoding);
-    *length =  fReader.readInt();
-    void* data = sk_malloc_throw(*length);
-    memcpy(data, fReader.skip(SkAlign4(*length)), *length);
-    return data;
-}
-
 void SkReadBuffer::readPoint(SkPoint* point) {
     point->fX = fReader.readScalar();
     point->fY = fReader.readScalar();
 }
 
 void SkReadBuffer::readMatrix(SkMatrix* matrix) {
     fReader.readMatrix(matrix);
 }
 
 void SkReadBuffer::readIRect(SkIRect* rect) {
@@ skipping 273 matching lines @@
             return;
         }
     } else {
         if (nullptr == this->readFunctionPtr()) {
             return;
         }
     }
     uint32_t sizeRecorded = fReader.readU32();
     fReader.skip(sizeRecorded);
 }