Remove deprecation warning

[asvetlov]

Fixes #3480

[codecov-io]

Codecov Report

Merging #3481 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3481      +/-   ##
==========================================
+ Coverage   97.94%   97.94%   +<.01%     
==========================================
  Files          44       44              
  Lines        8564     8678     +114     
  Branches     1383     1410      +27     
==========================================
+ Hits         8388     8500     +112     
- Misses         73       74       +1     
- Partials      103      104       +1

Impacted Files	Coverage Δ
aiohttp/web_response.py	98.41% <100%> (ø)	⬆️
aiohttp/web_fileresponse.py	96.55% <0%> (-1.15%)	⬇️
aiohttp/payload.py	99.09% <0%> (+0.47%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 37722f8...93dc501. Read the comment docs.

[lock]

This thread has been automatically locked since there has not been
any recent activity after it was closed. Please open a new issue for
related bugs.

If you feel like there's important points made in this discussion,
please include those exceprts into that new issue.