remove prototype pathops code

experimental/Intersection/QuadraticBounds.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 "CurveIntersection.h"
-#include "CurveUtilities.h"
-#include "Extrema.h"
-
-double leftMostT(const Quadratic& quad, double startT, double endT) {
-    double leftT;
-    if (findExtrema(quad[0].x, quad[1].x, quad[2].x, &leftT)
-            && startT <= leftT && leftT <= endT) {
-        return leftT;
-    }
-    _Point startPt;
-    xy_at_t(quad, startT, startPt.x, startPt.y);
-    _Point endPt;
-    xy_at_t(quad, endT, endPt.x, endPt.y);
-    return startPt.x <= endPt.x ? startT : endT;
-}
-
-void _Rect::setBounds(const Quadratic& quad) {
-    set(quad[0]);
-    add(quad[2]);
-    double tValues[2];
-    int roots = 0;
-    if (!between(quad[0].x, quad[1].x, quad[2].x)) {
-        roots = findExtrema(quad[0].x, quad[1].x, quad[2].x, tValues);
-    }
-    if (!between(quad[0].y, quad[1].y, quad[2].y)) {
-        roots += findExtrema(quad[0].y, quad[1].y, quad[2].y, &tValues[roots]);
-    }
-    for (int x = 0; x < roots; ++x) {
-        _Point result;
-        xy_at_t(quad, tValues[x], result.x, result.y);
-        add(result);
-    }
-}
-
-void _Rect::setRawBounds(const Quadratic& quad) {
-    set(quad[0]);
-    for (int x = 1; x < 3; ++x) {
-        add(quad[x]);
-    }
-}