Remove self from per-file OWNER since I'm global content OWNER

It confused at least one person.

BUG=None
R=oshima@chromium.org

Review URL: https://codereview.chromium.org/16664006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204979 0039d316-1c4b-4281-b951-d872f2087c98

content/OWNERS

@@ -13,7 +13,6 @@ per-file *.isolate=csharp@chromium.org
 per-file *.isolate=maruel@chromium.org
 per-file content_gpu.gypi=apatrick@chromium.org
 per-file content_gpu.gypi=kbr@chromium.org
-per-file content_gpu.gypi=piman@chromium.org
 per-file content_gpu.gypi=gman@chromium.org
 per-file content_jni.gypi=bulach@chromium.org
 per-file content_jni.gypi=yfriedman@chromium.org