Doc: Removing url variable from qdocconf file.

-url inherited from the url variable set in qtbase/doc/global

Change-Id: I383077c8b6d6d353037917ebc620af7175180f13
Reviewed-by: Martin Smith <martin.smith@digia.com>

src/activeqt/doc/activeqt.qdocconf

@@ -2,7 +2,6 @@ include($QT_INSTALL_DOCS/global/qt-module-defaults.qdocconf)
 
 project                 = ActiveQt
 description             = ActiveQt
-url                     = http://qt-project.org/doc/qt-$QT_VER
 version                 = $QT_VERSION
 
 examplesinstallpath     =