remove unused SkIntToFloatCast_NoOverflowCheck

tests/MathTest.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 "SkColorPriv.h"
 #include "SkEndian.h"
 #include "SkFloatBits.h"
@@ skipping 246 matching lines @@
 static void test_float_conversions(skiatest::Reporter* reporter, float x) {
     test_float_cast(reporter, x);
     test_float_floor(reporter, x);
     test_float_round(reporter, x);
     test_float_ceil(reporter, x);
 }
 
 static void test_int2float(skiatest::Reporter* reporter, int ival) {
     float x0 = (float)ival;
     float x1 = SkIntToFloatCast(ival);
-    float x2 = SkIntToFloatCast_NoOverflowCheck(ival);
     REPORTER_ASSERT(reporter, x0 == x1);
-    REPORTER_ASSERT(reporter, x0 == x2);
 }
 
 static void unittest_fastfloat(skiatest::Reporter* reporter) {
     SkRandom rand;
     size_t i;
 
     static const float gFloats[] = {
         0.f, 1.f, 0.5f, 0.499999f, 0.5000001f, 1.f/3,
         0.000000001f, 1000000000.f,     // doesn't overflow
         0.0000000001f, 10000000000.f    // does overflow
@@ skipping 316 matching lines @@
     test_divmod<int16_t>(r);
 }
 
 DEF_TEST(divmod_s32, r) {
     test_divmod<int32_t>(r);
 }
 
 DEF_TEST(divmod_s64, r) {
     test_divmod<int64_t>(r);
 }