Remove useless return statement

This useless return was discovered after improving the useless-return
checker. It has been removed to fix the warning.

Author: crazybolillo

pylint/checkers/imports.py

@@ -686,7 +686,6 @@ def _check_misplaced_future(self, node: nodes.ImportFrom) -> None:
                     isinstance(prev, nodes.ImportFrom) and prev.modname == "__future__"
                 ):
                     self.add_message("misplaced-future", node=node)
-            return
 
     def _check_same_line_imports(self, node: nodes.ImportFrom) -> None:
         # Detect duplicate imports on the same line.