Enable pyright's reportUnnecessaryTypeIgnoreComment setting for the whole test_cases directory (#8683)

test_cases/README.md

@@ -40,11 +40,8 @@ mypy's
 setting and pyright's
 [`reportUnnecessaryTypeIgnoreComment`](https://github.com/microsoft/pyright/blob/main/docs/configuration.md#type-check-diagnostics-settings)
 setting) to test instances where a type checker *should* emit some kind of
-error, if the stubs are correct. Note that mypy's `--warn-unused-ignores`
-setting is enabled for the entire subdirectory; however, the pyright setting
-must be enabled on a per-file basis with
-`# pyright: reportUnnecessaryTypeIgnoreComment=true` at the the top of the
-file.
+error, if the stubs are correct. Both settings are enabled by default for the entire
+subdirectory.
 
 For more information on using `assert_type` and
 `--warn-unused-ignores`/`reportUnnecessaryTypeIgnoreComment` to test type

test_cases/stdlib/builtins/test_dict.py

@@ -1,5 +1,3 @@
-# pyright: reportUnnecessaryTypeIgnoreComment=true
-
 from typing import Dict, Generic, Iterable, Tuple, TypeVar
 from typing_extensions import assert_type
 

test_cases/stdlib/builtins/test_pow.py

@@ -1,5 +1,3 @@
-# pyright: reportUnnecessaryTypeIgnoreComment=true
-
 from decimal import Decimal
 from fractions import Fraction
 from typing import Any

test_cases/stdlib/builtins/test_sum.py

@@ -1,5 +1,3 @@
-# pyright: reportUnnecessaryTypeIgnoreComment=true
-
 from typing import Any, List, Union
 from typing_extensions import Literal, assert_type
 

test_cases/stdlib/test_codecs.py

@@ -1,5 +1,3 @@
-# pyright: reportUnnecessaryTypeIgnoreComment=true
-
 import codecs
 from typing_extensions import assert_type
 

test_cases/stdlib/test_unittest.py

@@ -1,5 +1,3 @@
-# pyright: reportUnnecessaryTypeIgnoreComment=true
-
 import unittest
 from datetime import datetime, timedelta
 from decimal import Decimal