[PR #9678/7d2afcf4 backport][3.10] Remove dead code from WebSocketResponse.receive

[patchback]

This is a backport of PR #9678 as merged into master (7d2afcf).

extracted from #9666

[codspeed-hq]

CodSpeed Performance Report

Merging #9681 will not alter performance

_{Comparing patchback/backports/3.10/7d2afcf42a3b2299363c3872bd26765a8a9d2538/pr-9678 (12cd4c7) with 3.10 (e74abf6)}

Summary

✅ 13 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.86%. Comparing base (e74abf6) to head (12cd4c7).
Report is 1 commits behind head on 3.10.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.10    #9681      +/-   ##
==========================================
- Coverage   97.86%   97.86%   -0.01%     
==========================================
  Files         112      112              
  Lines       35439    35437       -2     
  Branches     4261     4261              
==========================================
- Hits        34683    34681       -2     
  Misses        564      564              
  Partials      192      192              

Flag	Coverage Δ
CI-GHA	97.75% <ø> (-0.01%)	⬇️
OS-Linux	97.44% <ø> (+<0.01%)	⬆️
OS-Windows	95.01% <ø> (ø)
OS-macOS	97.14% <ø> (-0.01%)	⬇️
Py-3.10.11	97.00% <ø> (-0.01%)	⬇️
Py-3.10.15	96.94% <ø> (-0.01%)	⬇️
Py-3.11.10	97.01% <ø> (-0.01%)	⬇️
Py-3.11.9	97.09% <ø> (+<0.01%)	⬆️
Py-3.12.7	97.48% <ø> (-0.01%)	⬇️
Py-3.13.0	97.46% <ø> (-0.01%)	⬇️
Py-3.8.10	94.40% <ø> (ø)
Py-3.8.18	96.74% <ø> (-0.01%)	⬇️
Py-3.9.13	96.91% <ø> (+<0.01%)	⬆️
Py-3.9.20	96.86% <ø> (-0.01%)	⬇️
Py-pypy7.3.16	96.46% <ø> (-0.01%)	⬇️
VM-macos	97.14% <ø> (-0.01%)	⬇️
VM-ubuntu	97.44% <ø> (+<0.01%)	⬆️
VM-windows	95.01% <ø> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.