Remove -webkit-hyphenate-limit relics.

After https://src.chromium.org/viewvc/blink?view=rev&revision=155171
this is useless churn.

R=jbroman@chromium.org,schenney@chromium.org,eae@chromium.org

Review URL: https://codereview.chromium.org/405413003

git-svn-id: svn://svn.chromium.org/blink/trunk@178681 bbb929c8-8fbe-4397-9dbb-9b2b20218538