Inappropriate use of #if 0 in QRegexp autotest

In qtbase/tests/auto/corelib/tools/qregexp/tst_qregexp.cpp, two lines of test data are disabled by #if 0. These were originally added in February 2008 a commit described as "Added a commented-out test case for QRegExp for Developer X to look at. Related to qdoc optimization."

Presumably Developer X never got around to looking at it.

If the test data is still appropriate, it should be re-enabled and any failures that this reveals should be handled by adding QEXPECT_FAIL calls to the test and raising bug reports for the bugs. If the test data is no longer appropriate, it should be removed.