Removed qtwebkit from qttools sync.profile

Removed qtwebkit from qttools sync.profile

The qt-modularization-base branch of webkit doesn't compile against
post-refactor Qt, and isn't likely to any time soon.

The qtwebkit dependency for qttools is optional, so we'll remove it for
now and test without it until the webkit situation is improved.

Change-Id: I1ed57bd5a91fb7056a3c8daddde33d33a41e72a3
Reviewed-on: http://codereview.qt-project.org/5187
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Toby Tomkins <toby.tomkins@nokia.com>