MAINT Rules E721 and F841 are not in preview anymore

Author: DimitriPapadopoulos

pyproject.toml

@@ -156,11 +156,11 @@ ignore=[
     "E731",
     # do not use variables named 'l', 'O', or 'I'
     "E741",
-    # E721 is in preview (july 2024) and gives many false positives.
+    # E721 gives many false positives.
     # Use `is` and `is not` for type comparisons, or `isinstance()` for
     # isinstance checks
     "E721",
-    # F841 is in preview (july 2024), and we don't care much about it.
+    # we don't care much about F841.
     # Local variable ... is assigned to but never used
     "F841",
     # `try`-`except` within a loop incurs performance overhead