Remove SVGCSSParser.cpp

This should have been removed in https://codereview.chromium.org/184693003/

Review URL: https://codereview.chromium.org/178543008

git-svn-id: svn://svn.chromium.org/blink/trunk@168365 bbb929c8-8fbe-4397-9dbb-9b2b20218538