Remove pleroma code on gnusocial removal

src/freedombone-app-gnusocial

         rm /etc/cron.hourly/gnusocial-daemons
     fi
     remove_backup_database_local gnusocial
+    if [ -d $INSTALL_DIR/pleroma ]; then
+        rm -rf $INSTALL_DIR/pleroma
+    fi
 
     function_check remove_ddns_domain
     remove_ddns_domain $GNUSOCIAL_DOMAIN_NAME