Remove the patcher script and its dependencies.

We don't need it anymore as the V8 patch for the XDK has been removed.
We can revert this patch if one day in the future we need that.

Author: darktears

DEPS

@@ -37,12 +37,6 @@ hooks = [
     "pattern": ".",
     "action": ["python", "src/xwalk/tools/fetch_deps.py", "-v"],
   },
-  {
-    # Apply patches.
-    "name": "patcher",
-    "pattern": ".",
-    "action": ["python", "src/xwalk/tools/patcher.py", "--patch-config", "src/xwalk/patch/patch.cfg"],
-  },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "name": "gyp-xwalk",