Remove unused variable assignments

exceptions/updates/MDcouldNotSetPublic.php

@@ -3,7 +3,7 @@
 
 /**
  * Exception thrown in case the main entity of a page (e.g. an object, an institution etc.)
- * are not set public.
+ * could not be set public.
  */
 final class MDcouldNotSetPublic extends Exception {
     /**
@@ -13,8 +13,7 @@ final class MDcouldNotSetPublic extends Exception {
      */
     public function errorMessage() {
         //error message
-        $errorMsg = 'Could not set this to public.';
-        return $errorMsg;
+        return 'Could not set this to public.';
 
     }
 }