ffmpeg roll to remove unused patch

BUG=50678
TEST=helps ubuntu ffmpeg patching system

Review URL: http://codereview.chromium.org/3034061

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55248 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -2,7 +2,7 @@ vars = {
   "webkit_trunk":
   "http://svn.webkit.org/repository/webkit/trunk",
   "webkit_revision": "64821",
-  "ffmpeg_revision": "54360",
+  "ffmpeg_revision": "54382",
   "skia_revision": "592",
   "chromium_git": "http://src.chromium.org/git",
   "swig_revision": "40423",