custom perform() method is not needed here

MatrixPlugin.php

@@ -111,22 +111,6 @@ class MatrixPlugin extends StudIPPlugin implements StandardPlugin
         return null;
     }
 
-    public function perform($unconsumed_path) {
-        $range_id = Request::option('cid', Context::get()->id);
-
-        URLHelper::removeLinkParam('cid');
-        $dispatcher = new Trails_Dispatcher(
-            $this->getPluginPath(),
-            rtrim(PluginEngine::getLink($this, [], null), '/'),
-            'matrix_chat'
-        );
-        URLHelper::addLinkParam('cid', $range_id);
-
-        $dispatcher->current_plugin = $this;
-        $dispatcher->range_id       = $range_id;
-        $dispatcher->dispatch($unconsumed_path);
-    }
-
     /**
      * User is now member of a course, send invitation to Matrix room if necessary.
      *

plugin.manifest

 pluginname=Matrix-Chat
 pluginclassname=MatrixPlugin
 origin=data-quest
-version=1.4.7
+version=1.5
 screenshot=assets/images/matrix_logo.png
 description=Matrix chat for Stud.IP courses
 studipMinVersion=4.5
-studipMaxVersion=5.9.99