Fix robocopy function signature

src/aind_behavior_experiment_launcher/data_transfer/robocopy_service.py

@@ -81,7 +81,7 @@ def _solve_src_dst_mapping(
                 raise ValueError("Destination should be provided when source is a single path.")
             return {source: Path(destination)}
 
-    def validate(self, *args, **kwargs):
+    def validate(self):
         if not shutil.which("robocopy"):
             logger.error("Robocopy command is not available on this system.")
             return False