remove duplicated imports (closes #25502)
diff --git a/Lib/pickletools.py b/Lib/pickletools.py
index cf5df41..155bd5b 100644
--- a/Lib/pickletools.py
+++ b/Lib/pickletools.py
@@ -2793,7 +2793,7 @@
     return doctest.testmod()
 
 if __name__ == "__main__":
-    import sys, argparse
+    import argparse
     parser = argparse.ArgumentParser(
         description='disassemble one or more pickle files')
     parser.add_argument(