Restore type-ignores

Author: rhshadrach

pandas/core/arrays/masked.py

@@ -1858,10 +1858,10 @@ def all(
         result = values.all(axis=axis)
 
         if skipna:
-            return result
+            return result  # type: ignore[return-value]
         else:
             if not result or len(self) == 0 or not self._mask.any():
-                return result
+                return result  # type: ignore[return-value]
             else:
                 return self.dtype.na_value