remove prototype pathops code

experimental/Intersection/TriangleUtilities.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.
- */
-
-#include "TriangleUtilities.h"
-
-// http://www.blackpawn.com/texts/pointinpoly/default.html
-bool pointInTriangle(const Triangle& triangle, const _Point& pt) {
-// Compute vectors
-    _Vector v0 = triangle[2] - triangle[0];
-    _Vector v1 = triangle[1] - triangle[0];
-    _Vector v2 = pt - triangle[0];
-
-// Compute dot products
-    double dot00 = v0.dot(v0);
-    double dot01 = v0.dot(v1);
-    double dot02 = v0.dot(v2);
-    double dot11 = v1.dot(v1);
-    double dot12 = v1.dot(v2);
-
-// Compute barycentric coordinates
-    double invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
-    double u = (dot11 * dot02 - dot01 * dot12) * invDenom;
-    double v = (dot00 * dot12 - dot01 * dot02) * invDenom;
-
-// Check if point is in triangle
-    return (u >= 0) && (v >= 0) && (u + v < 1);
-}