man_parsing: Remove redundant return statement

A `return` line is present by mistake outside the scope of a function.
Remove it.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Author: razvand

attack_surface_approximation/dictionaries_generators/heuristics/man_parsing.py

@@ -47,5 +47,3 @@ def generate(_: str = None) -> typing.List[str]:
         all_arguments.update(arguments)
 
     return all_arguments
-
-    return all_arguments