Remove unused static functions in QtXmlPatterns

Found by Clang 3.4.

Change-Id: I60f78b62d2ecacf58d534623eced537ca62a2405
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Remove unused variable, found by ICC 14

qxslttokenizer.cpp(700): warning #177: variable "val" was declared but never referenced
              const QStringRef val(m_currentAttributes.value(CommonNamespaces::XML, QLatin1String("space")));
                               ^

Change-Id: Ic806bf1e9c22ead8680907b0e22794d7b07dcc90
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Merge remote-tracking branch 'origin/stable' into dev

Change-Id: I220517794f3427f9f1746981e8dc7256bb482285