Remove unneeded getters/setters

Remove unneeded getters/setters, these methods are unneeded or not used.

Review URL: https://codereview.chromium.org/375673002

git-svn-id: svn://svn.chromium.org/blink/trunk@177700 bbb929c8-8fbe-4397-9dbb-9b2b20218538