Remove unused code from Frame class destructor
https://bugs.webkit.org/show_bug.cgi?id=113181

Reviewed by Alexey Proskuryakov.

No new tests. No new functionality.

* page/Frame.cpp:
(WebCore::Frame::~Frame):

    Removed the code which could never have been executed
    as m_view had been set to '0'.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146815 268f45cc-cd09-0410-ab3c-d52691b4dbfc