remove unused SkIntToFloatCast_NoOverflowCheck

src/core/SkFloatBits.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFloatBits.h"
 #include "SkMathPriv.h"
 
@@ skipping 185 matching lines @@
     }
 
     // now value is left-aligned to 24 bits
     SkASSERT((value >> 23) == 1);
     SkASSERT(shift >= 0 && shift <= 255);
 
     SkFloatIntUnion data;
     data.fSignBitInt = (sign << 31) | (shift << 23) | (value & ~MATISSA_MAGIC_BIG);
     return data.fFloat;
 }
-
-float SkIntToFloatCast_NoOverflowCheck(int32_t value) {
-    if (0 == value) {
-        return 0;
-    }
-
-    int shift = EXP_BIAS;
-
-    // record the sign and make value positive
-    int sign = SkExtractSign(value);
-    value = SkApplySign(value, sign);
-
-    int zeros = SkCLZ(value << 8);
-    value <<= zeros;
-    shift -= zeros;
-
-    SkFloatIntUnion data;
-    data.fSignBitInt = (sign << 31) | (shift << 23) | (value & ~MATISSA_MAGIC_BIG);
-    return data.fFloat;
-}