Revert of Add new module for distance field generation.

src/core/SkDistanceFieldGen.h

Index: src/core/SkDistanceFieldGen.h
diff --git a/src/core/SkDistanceFieldGen.h b/src/core/SkDistanceFieldGen.h
deleted file mode 100755
index 3d2ec23b75de31460a23290dcc603491b0064da2..0000000000000000000000000000000000000000
--- a/src/core/SkDistanceFieldGen.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef SkDistanceFieldGen_DEFINED
-#define SkDistanceFieldGen_DEFINED
-
-/** Given 8-bit mask data, generate the associated distance field
-
- *  @param distanceField     The distance field to be generated. Should already be allocated
- *                           by the client with the padding below.
- *  @param image             8-bit mask we're using to generate the distance field.
- *  @param w                 Width of the image.
- *  @param h                 Height of the image.
- *  @param distanceMagnitude Largest possible absolute value for the distance. The distance field
- *                           will be padded to w + 2*distanceMagnitude, h + 2*distanceMagnitude.
- */
-bool SkGenerateDistanceFieldFromImage(unsigned char* distanceField,
-                                      const unsigned char* image,
-                                      int w, int h,
-                                      int distanceMagnitude);
-
-#endif