Update cyclonedx/model/license.py

Co-authored-by: Jan Kowalleck <jan.kowalleck@gmail.com>
Signed-off-by: Johannes Feichtner <343448+Churro@users.noreply.github.com>

Author: Churro

cyclonedx/model/license.py

@@ -605,7 +605,6 @@ def __serialize_license_expression_details_xml(
         if expression_value:
             elem.set(f'{{{xmlns}}}expression' if xmlns else 'expression', expression_value)
             elem.text = None
-
         return elem
 
     @staticmethod