Remove timing dependent, occasionally failing cue point tests.

    Remove timing dependent, occasionally failing cue point tests.
        Cue points will be replaced with cue ranges soon anyway.

        * media/video-cuepoint-pause-expected.txt: Removed.
        * media/video-cuepoint-remove-multiple-expected.txt: Removed.
        * media/video-cuepoint-multiple-expected.txt: Removed.
        * media/video-cuepoint-remove-expected.txt: Removed.
        * media/video-cuepoint-pause.html: Removed.
        * media/video-cuepoint-remove-multiple.html: Removed.
        * media/video-cuepoint-multiple.html: Removed.
        * media/video-cuepoint-remove.html: Removed.
        * media/video-cuepoint-add-expected.txt: Removed.
        * media/video-cuepoint-add.html: Removed.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@27329 268f45cc-cd09-0410-ab3c-d52691b4dbfc