fix: revert mistake setting TALISMAN_ENABLED=False (#34909)

(cherry picked from commit bc9ec6a)

Author: mistercrunch

superset/config.py

@@ -1815,7 +1815,6 @@ def EMAIL_HEADER_MUTATOR(  # pylint: disable=invalid-name,unused-argument  # noq
 
 # Do you want Talisman enabled?
 TALISMAN_ENABLED = utils.cast_to_boolean(os.environ.get("TALISMAN_ENABLED", True))
-TALISMAN_ENABLED = False
 
 # If you want Talisman, how do you want it configured??
 # For more information on setting up Talisman, please refer to