remove wjia from media OWNERS

wjia is no longer working on chrome.

Review URL: https://codereview.chromium.org/650993002

Cr-Commit-Position: refs/heads/master@{#299352}

content/browser/media/OWNERS

@@ -4,7 +4,6 @@ perkj@chromium.org
 scherkus@chromium.org
 tommi@chromium.org
 vrk@chromium.org
-wjia@chromium.org
 xhwang@chromium.org
 xians@chromium.org
 

content/renderer/media/OWNERS

@@ -4,7 +4,6 @@ perkj@chromium.org
 scherkus@chromium.org
 tommi@chromium.org
 vrk@chromium.org
-wjia@chromium.org
 wolenetz@chromium.org
 xhwang@chromium.org
 xians@chromium.org

media/base/android/OWNERS

 # Preferred reviewers.
 qinmin@chromium.org
-wjia@chromium.org
+