fix(node_http2.cc): remove duplicate codeblock

[AVVS]

Original bug was introduced in here: https://github.com/nodejs/node/pull/55155/files#diff-33f026e43570112875cf4c8eab6743496f3aa014329611128e348ec23d6f771cL1303-R1313
Doesn't seem like that it actually leads to any problems, except extra memcpy

[nodejs-github-bot]

Review requested:

• @nodejs/http2
• @nodejs/net

[anonrig]

Nice!

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/63628/

[anonrig]

@AVVS you need to update your commit message according to the requirements

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.00%. Comparing base (1d01ad6) to head (6cefd81).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #55915      +/-   ##
==========================================
- Coverage   88.01%   88.00%   -0.01%     
==========================================
  Files         653      653              
  Lines      187735   187731       -4     
  Branches    35874    35870       -4     
==========================================
- Hits       165229   165220       -9     
- Misses      15693    15696       +3     
- Partials     6813     6815       +2     

Files with missing lines	Coverage Δ
src/node_http2.cc	84.83% <ø> (+0.11%)	⬆️

... and 26 files with indirect coverage changes

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[AVVS]

updated commit message

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/63635/