Stub TwitterChannelInfo.requestListMode

Issue 3501.

Change-Id: Ie5e889b23f76136bbabb19f86e54dbd22411d7cb
Reviewed-on: http://gerrit.dmdirc.com/480
Automatic-Compile: DMDirc Local Commits <devs-public@dmdirc.com>
Reviewed-by: Gregory Holmes <greboid@dmdirc.com>
Tested-by: Gregory Holmes <greboid@dmdirc.com>
Automatic-Compile: Gregory Holmes <greboid@dmdirc.com>
Automatic-Compile: Chris Smith <chris@dmdirc.com>
Automatic-Compile: Shane Mc Cormack <shane@dmdirc.com>

src/com/dmdirc/addons/parser_twitter/TwitterChannelInfo.java

@@ -230,6 +230,12 @@ public class TwitterChannelInfo implements ChannelInfo {
         }
     }
 
+    /** {@inheritDoc} */
+    @Override
+    public void requestListModes() {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
     /** {@inheritDoc} */
     @Override
     public Collection<ChannelListModeItem> getListMode(final char mode) {