remove 'return' statement from hsa 'dummy_handler'

Author: lvalerom

astroquery/esa/hsa/tests/dummy_handler.py

@@ -40,4 +40,3 @@ def check_parameters(self, parameters, method_name):
                                      f"Expected:'{parameters[key]}'")
             else:
                 raise ValueError(f"Parameter '{key}' not found in method '{method_name}'")
-        return True