Remove resizing window in BlockFormMessagesTest::testValidationMessage

I believe the screen resizing isn't necessary anymore.

The normal routine to prove a random failure is fixed is to run the failing patch and the patch with the fix at the same time, whilst the latter has to have ~8000 - 10.000 failure free runs to prove it's credibility.

Since this issue is a bit different, there is no failing test, we can "just" run the patch without the screen resize and see if it has ~8000 - 10.000 failure free runs

So let's do that here.

Ok...

5000x seems a bit too much, after we hit around 45 minutes in the test run, things go "wonky".
Let's see what 3000x brings us

11 * 3000 = 33.000 runs without a failure.
Good enough for me, here's the actual patch.

I believe the screen resizing isn't necessary anymore.

This issue is to figure out why this line was making the test pass, but something in the meanwhile has made this no longer needed. The patch in #14 looks great. I would love to know why but I think we can commit this as-is.

Committed c61764b and pushed to 11.x. Thanks!

Wary of backporting things that might cause random fails, it's not hurting anything so let's put this in 11.x only.

Automatically closed - issue fixed for 2 weeks with no activity.