Removed dead code from ResourceFetcher, nothing inserts into this deque anymore

R=japhet@chromium.org
BUG=

Review URL: https://codereview.chromium.org/155433004

git-svn-id: svn://svn.chromium.org/blink/trunk@166543 bbb929c8-8fbe-4397-9dbb-9b2b20218538