Remove reference to clucene from sync.profile

Clucene got removed completely in 5.9 branch.

Change-Id: I7e0860d6ce7a0e493e8163892745235ccbda74a5
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

sync.profile

 %modules = ( # path to module name map
-    "QtCLucene" => "$basedir/src/assistant/clucene",
     "QtHelp" => "$basedir/src/assistant/help",
     "QtUiTools" => "$basedir/src/designer/src/uitools",
     "QtUiPlugin" => "$basedir/src/designer/src/uiplugin",