(Fix Tests): Change method from shutil.remove to shutil.rmtree

- remove was not a member of shutil and tests were failing because of
it. To fix it, shutil.rmtree is used.

Signed-off-by: Akash Srivastava <akashsrivastava4927@gmail.com>

noxfile.py

@@ -73,7 +73,7 @@ def should_update_common_wheels():
 
     # Clear the stale cache.
     if need_to_repopulate:
-        shutil.remove(LOCATIONS["common-wheels"], ignore_errors=True)
+        shutil.rmtree(LOCATIONS["common-wheels"], ignore_errors=True)
 
     return need_to_repopulate