Remove @unittest_run_loop

[Dreamsorcerer]

Removes the now unneeded @unittest_run_loop from master.

[webknjaz]

@Dreamsorcerer is the new default on regardless of the Python version?

[Dreamsorcerer]

@Dreamsorcerer is the new default on regardless of the Python version?

Appears to have a fallback on asynctest, so looks like it:
https://github.com/aio-libs/aiohttp/blob/master/aiohttp/test_utils.py#L60

[webknjaz]

Appears to have a fallback on asynctest, so looks like it:
https://github.com/aio-libs/aiohttp/blob/master/aiohttp/test_utils.py#L60

Could you make sure that there's a test for this then?

[codecov]

Codecov Report

Merging #5516 (39100f5) into master (a970c50) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5516      +/-   ##
==========================================
- Coverage   97.17%   97.17%   -0.01%     
==========================================
  Files          41       41              
  Lines        8860     8854       -6     
  Branches     1424     1424              
==========================================
- Hits         8610     8604       -6     
  Misses        133      133              
  Partials      117      117              

Flag	Coverage Δ
unit	97.06% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
aiohttp/test_utils.py	99.68% <ø> (-0.01%)	⬇️

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[Dreamsorcerer]

Could you make sure that there's a test for this then?

Indeed, the test_test_utils.py covers this already:
https://github.com/aio-libs/aiohttp/blob/unittest1/tests/test_test_utils.py#L105-L109