diff --git a/plugins/Toolbox/src/Toolbox.py b/plugins/Toolbox/src/Toolbox.py
index e3903d0bfd..54fe80e23c 100644
--- a/plugins/Toolbox/src/Toolbox.py
+++ b/plugins/Toolbox/src/Toolbox.py
@@ -103,7 +103,6 @@ class Toolbox(QObject, Extension):
 
         # variables for the license agreement dialog
         self._license_dialog_plugin_file_location = ""  # type: str
-        self._restart_dialog_message = ""  # type: str
 
         self._application.initializationFinished.connect(self._onAppInitialized)