remove flake8 and suggest pycqa/flake8

pre_commit_hooks/autopep8_wrapper.py

@@ -1,9 +0,0 @@
-def main() -> int:
-    raise SystemExit(
-        'autopep8-wrapper is deprecated.  Instead use autopep8 directly via '
-        'https://github.com/pre-commit/mirrors-autopep8',
-    )
-
-
-if __name__ == '__main__':
-    exit(main())

pre_commit_hooks/removed.py

@@ -0,0 +1,15 @@
+import sys
+from typing import Optional
+from typing import Sequence
+
+
+def main(argv: Optional[Sequence[str]] = None) -> int:
+    argv = argv if argv is not None else sys.argv[1:]
+    hookid, new_hookid, url = argv
+    raise SystemExit(
+        f'`{hookid}` has been removed -- use `{new_hookid}` from {url}',
+    )
+
+
+if __name__ == '__main__':
+    exit(main())