Remove deleteAllValues(const Deque&)

Remove deleteAllValues(const Deque&) as it is never used.

Review URL: https://codereview.chromium.org/495333002

git-svn-id: svn://svn.chromium.org/blink/trunk@180820 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Cleanup namespace usage in Source/binding and Source/web

BUG=

Review URL: https://codereview.chromium.org/498603003

git-svn-id: svn://svn.chromium.org/blink/trunk@180821 bbb929c8-8fbe-4397-9dbb-9b2b20218538