Drop unnecessary type: ignore

This has been fixed in types-requests [1].

[1] python/typeshed#15778

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: I2f8feb12445acd5885c7c1f4b1a74661dd43b11c

Author: stephenfin

keystoneauth1/session.py

@@ -1670,4 +1670,4 @@ def init_poolmanager(self, *args: ty.Any, **kwargs: ty.Any) -> None:
             # hands for no longer than 2 minutes before a ConnectionError is
             # raised.
             kwargs['socket_options'] = socket_options
-        super().init_poolmanager(*args, **kwargs)  # type: ignore[no-untyped-call]
+        super().init_poolmanager(*args, **kwargs)