Remove unused encodedString API on SkWriteBuffer/SkReadBuffer

src/core/SkReadBuffer.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkReadBuffer_DEFINED
 #define SkReadBuffer_DEFINED
 
@@ skipping 104 matching lines @@
     virtual int32_t readInt();
     virtual SkScalar readScalar();
     virtual uint32_t readUInt();
     virtual int32_t read32();
 
     // peek
     virtual uint8_t peekByte();
 
     // strings -- the caller is responsible for freeing the string contents
     virtual void readString(SkString* string);
-    virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding);
 
     // common data structures
     virtual void readPoint(SkPoint* point);
     SkPoint readPoint() { SkPoint p; this->readPoint(&p); return p; }
     virtual void readMatrix(SkMatrix* matrix);
     virtual void readIRect(SkIRect* rect);
     virtual void readRect(SkRect* rect);
     virtual void readRRect(SkRRect* rrect);
     virtual void readRegion(SkRegion* region);
 
@@ skipping 141 matching lines @@
     SkPicture::InstallPixelRefProc fBitmapDecoder;
 
 #ifdef DEBUG_NON_DETERMINISTIC_ASSERT
     // Debugging counter to keep track of how many bitmaps we
     // have decoded.
     int fDecodedBitmapIndex;
 #endif // DEBUG_NON_DETERMINISTIC_ASSERT
 };
 
 #endif // SkReadBuffer_DEFINED