(DOCSP-18989): Remove note about mongosh custom app name

Author: jeff-allen-mongo

source/reference/connection-string.txt

@@ -964,8 +964,11 @@ Miscellaneous Configuration
        - the :data:`system.profile.appName` field in the :doc:`database
          profiler </reference/database-profiler>` output.
 
-       If you do not specify a custom app name, the :binary:`~bin.mongo`
-       shell uses the default "``MongoDB Shell``".
+       The :urioption:`appName` connection option is only applicable
+       when provided to a :ecosystem:`MongoDB Driver </>`. This
+       parameter has no effect when supplied to a client application
+       such as :compass:`MongoDB Compass </>` or the
+       :binary:`~bin.mongo` shell.
 
        .. versionadded:: 4.0