Drop needless creation of KWindowInfo instance in Workspace::addClient

Completely unused and got (probably accidentally) introduced with the
merge of the kwin scripting GSOC project.

workspace.cpp

@@ -66,7 +66,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KStartupInfo>
-#include <KWindowInfo>
 // Qt
 #include <QtConcurrentRun>
 
@@ -485,8 +484,6 @@ void Workspace::addClient(Client* c)
 {
     Group* grp = findGroup(c->window());
 
-    KWindowInfo info(c->window(), NET::WMAllProperties, NET::WM2WindowClass);
-
     emit clientAdded(c);
 
     if (grp != NULL)