Mypy fixes

Author: ianthomas23

lib/matplotlib/pyplot.py

@@ -2505,11 +2505,11 @@ def polar(*args, **kwargs) -> list[Line2D]:
 # requested, ignore rcParams['backend'] and force selection of a backend that
 # is compatible with the current running interactive framework.
 if (rcParams["backend_fallback"]
-        and rcParams._get_backend_or_none() in (  # type: ignore
+        and rcParams._get_backend_or_none() in (  # type: ignore[attr-defined]
             set(backend_registry.list_builtin(BackendFilter.INTERACTIVE)) -
             {'WebAgg', 'nbAgg'})
-        and cbook._get_running_interactive_framework()):  # type: ignore
-    rcParams._set("backend", rcsetup._auto_backend_sentinel)  # type: ignore
+        and cbook._get_running_interactive_framework()):
+    rcParams._set("backend", rcsetup._auto_backend_sentinel)
 
 # fmt: on