[Qt] Qt 4.8 tool related stuff removal from webkitpy.
https://bugs.webkit.org/show_bug.cgi?id=112699.

Reviewed by Adam Barth.

* Scripts/webkitpy/layout_tests/port/qt.py:
(QtPort._search_paths):
(QtPort._port_specific_expectations_files):
* Scripts/webkitpy/layout_tests/port/qt_unittest.py:
(QtPortTest):
(QtPortTest._assert_search_path):
(QtPortTest._assert_expectations_files):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146347 268f45cc-cd09-0410-ab3c-d52691b4dbfc