Remove mypy_test_suite (#5543)

Closes: #5540

Author: srittau

.github/workflows/tests.yml

@@ -72,15 +72,6 @@ jobs:
       - run: pip install -U git+git://github.com/python/mypy
       - run: ./tests/mypy_test.py --platform=${{ matrix.platform }}
 
-  mypy-test-suite:
-    name: Run the mypy test suite
-    # Ubuntu 20.04 doesn't have the Python 2 venv module.
-    runs-on: ubuntu-18.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-      - run: ./tests/mypy_test_suite.py
-
   pyright:
     name: Run pyright against the stubs
     runs-on: ubuntu-latest

tests/README.md

@@ -5,8 +5,6 @@ tests typeshed with [mypy](https://github.com/python/mypy/)
 [pytype](https://github.com/google/pytype/).
 - `tests/pyright_test.py` tests typeshed with
 [pyright](https://github.com/microsoft/pyright).
-- `tests/mypy_test_suite.py` runs a subset of mypy's test suite using this version of
-typeshed.
 - `tests/check_consistent.py` checks certain files in typeshed remain
 consistent with each other.
 - `tests/stubtest_test.py` checks stubs against the objects at runtime.
@@ -53,18 +51,6 @@ but it uses the same pyright version and configuration as the CI.
 (.venv3)$ python3 tests/pyright_test.py stdlib/sys.pyi  # Check one file
 ```
 
-## mypy\_test\_suite.py
-
-This test requires Python 3.5 or higher; Python 3.6.1 or higher is recommended.
-Run using:
-```
-(.venv3)$ python3 tests/mypy_test_suite.py
-```
-
-This test runs mypy's own test suite using the typeshed code in your repo. This
-will sometimes catch issues with incorrectly typed stubs, but is much slower
-than the other tests.
-
 ## check\_consistent.py
 
 Run using: