Remove obsolete files and comment from skia/

skia/fix_for_1186198.diff

-Index: sgl/SkEdge.cpp
-===================================================================
---- sgl/SkEdge.cpp      (revision 42965)
-+++ sgl/SkEdge.cpp      (working copy)
-@@ -17,6 +17,7 @@
- 
- #include "SkEdge.h"
- #include "SkFDot6.h"
-+#include <limits>
- 
- /*
-     In setLine, setQuadratic, setCubic, the first thing we do is to convert
-@@ -76,8 +77,23 @@
- 
-     fX          = SkFDot6ToFixed(x0 + SkFixedMul(slope, (32 - y0) & 63));   // + SK_Fixed1/2
-     fDX         = slope;
--    fFirstY     = SkToS16(top);
--    fLastY      = SkToS16(bot - 1);
-+    fFirstY     = (int16_t)(top);       // inlined skToS16()
-+    if (top != (long)fFirstY) {
-+        if (fFirstY < top) {
-+            fFirstY = std::numeric_limits<int16_t>::max();
-+        } else {
-+            fFirstY = std::numeric_limits<int16_t>::min();
-+        }
-+        fX -= fDX * (top - (long)fFirstY);
-+    }
-+    fLastY      = (int16_t)(bot - 1);   // inlined SkToS16()
-+    if (bot-1 != (long)fLastY) {
-+        if (fLastY < bot-1) {
-+            fLastY = std::numeric_limits<int16_t>::max();
-+        } else {
-+            fLastY = std::numeric_limits<int16_t>::min();
-+        }
-+    }
-     fCurveCount = 0;
-     fWinding    = SkToS8(winding);
-     fCurveShift = 0;