Remove unused `# type: ignore`s (#12531)

Over time we've begun to use newer versions of mypy, typeshed, stub
packages---and of course we've improved our own annotations. This makes
some type ignore comments no longer necessary. I have removed them.

There was one exception: a module that imports `select.epoll`. The
ignore is redundant on Linux, but I've kept it ignored for those of us
who work on the source tree using not-Linux. (#11771)

I'm more interested in the config line which enforces this. I want
unused ignores to be reported, because I think it's useful feedback when
annotating to know when you've fixed a problem you had to previously
ignore.

* Installing extras before typechecking

Lacking an easy way to install all extras generically, let's bite the bullet and
make install the hand-maintained `all` extra before typechecking.

Now that https://github.com/matrix-org/backend-meta/pull/6 is merged to
the release/v1 branch.

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/test_utils/__init__.py b/tests/test_utils/__init__.py
index f05a373aa0..0d0d6faf0d 100644
--- a/tests/test_utils/__init__.py
+++ b/tests/test_utils/__init__.py
@@ -52,7 +52,7 @@ def make_awaitable(result: TV) -> Awaitable[TV]:
     This uses Futures as they can be awaited multiple times so can be returned
     to multiple callers.
     """
-    future = Future()  # type: ignore
+    future: Future[TV] = Future()
     future.set_result(result)
     return future
 
@@ -69,7 +69,7 @@ def setup_awaitable_errors() -> Callable[[], None]:
 
     # State shared between unraisablehook and check_for_unraisable_exceptions.
     unraisable_exceptions = []
-    orig_unraisablehook = sys.unraisablehook  # type: ignore
+    orig_unraisablehook = sys.unraisablehook
 
     def unraisablehook(unraisable):
         unraisable_exceptions.append(unraisable.exc_value)
@@ -78,11 +78,11 @@ def setup_awaitable_errors() -> Callable[[], None]:
         """
         A method to be used as a clean-up that fails a test-case if there are any new unraisable exceptions.
         """
-        sys.unraisablehook = orig_unraisablehook  # type: ignore
+        sys.unraisablehook = orig_unraisablehook
         if unraisable_exceptions:
             raise unraisable_exceptions.pop()
 
-    sys.unraisablehook = unraisablehook  # type: ignore
+    sys.unraisablehook = unraisablehook
 
     return cleanup