Remove an unused function.

src/ports/SkFontHost_win.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkBase64.h"
 #include "SkColorPriv.h"
@@ skipping 1205 matching lines @@
 
     for (int y = 0; y < glyph.fHeight; y++) {
         for (int i = 0; i < width; i++) {
             dst[i] = rgb_to_lcd16<APPLY_PREBLEND>(src[i], tableR, tableG, tableB);
         }
         src = SkTAddOffset<const SkGdiRGB>(src, srcRB);
         dst = (uint16_t*)((char*)dst - dstRB);
     }
 }
 
-static inline unsigned clamp255(unsigned x) {
-    SkASSERT(x <= 256);
-    return x - (x >> 8);
-}
-
 void SkScalerContext_GDI::generateImage(const SkGlyph& glyph) {
     SkASSERT(fDDC);
 
     const bool isBW = SkMask::kBW_Format == fRec.fMaskFormat;
     const bool isAA = !isLCD(fRec);
 
     size_t srcRB;
     const void* bits = fOffscreen.draw(glyph, isBW, &srcRB);
     if (NULL == bits) {
         LogFontTypeface::EnsureAccessible(this->getTypeface());
@@ skipping 1271 matching lines @@
 
 private:
     SkTDArray<ENUMLOGFONTEX> fLogFontArray;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkFontMgr* SkFontMgr_New_GDI() {
     return SkNEW(SkFontMgrGDI);
 }