remove prototype pathops code

experimental/Intersection/IntersectionUtilities.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.
- */
-
-#if 0
-// snippets that one day may be useful, unused for now...
-
-// get sign, exponent, mantissa from double
-// Translate the double into sign, exponent and mantissa.
-    long bits = BitConverter.DoubleToInt64Bits(d);
-    // Note that the shift is sign-extended, hence the test against -1 not 1
-    bool negative = (bits < 0);
-    int exponent = (int) ((bits >> 52) & 0x7ffL);
-    long mantissa = bits & 0xfffffffffffffL;
-
-    // Subnormal numbers; exponent is effectively one higher,
-    // but there's no extra normalisation bit in the mantissa
-    if (exponent==0)
-    {
-        exponent++;
-    }
-    // Normal numbers; leave exponent as it is but add extra
-    // bit to the front of the mantissa
-    else
-    {
-        mantissa = mantissa | (1L<<52);
-    }
-
-    // Bias the exponent. It's actually biased by 1023, but we're
-    // treating the mantissa as m.0 rather than 0.m, so we need
-    // to subtract another 52 from it.
-    exponent -= 1075;
-
-    if (mantissa == 0)
-    {
-        return "0";
-    }
-
-    /* Normalize */
-    while((mantissa & 1) == 0)
-    {    /*  i.e., Mantissa is even */
-        mantissa >>= 1;
-        exponent++;
-    }
-#endif