[BlackBerry] Remove stale comment for select mouse handling.
https://bugs.webkit.org/show_bug.cgi?id=116309

Reviewed by Rob Buis.

PR 135935.

Remove a FIXME that has been invalidated by a change
to our touch -> mouse model.

Internally Rubberstamped by Genevieve Mak.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::handleMouseEvent):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150257 268f45cc-cd09-0410-ab3c-d52691b4dbfc