Remove includes of GraphicsContextAnnotator.h

Redundant include left behind when moving code to paint/.
Also remove some other (unused) painting related includes.

BUG=412088

Review URL: https://codereview.chromium.org/721413004

git-svn-id: svn://svn.chromium.org/blink/trunk@185386 bbb929c8-8fbe-4397-9dbb-9b2b20218538