remove unneeded overflow check when parsing the max_ack_delay

[marten-seemann]

No description provided.

[codecov]

Codecov Report

Merging #2996 (2e5c43b) into master (d1c5297) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2996      +/-   ##
==========================================
+ Coverage   86.12%   86.13%   +0.02%     
==========================================
  Files         135      135              
  Lines        9379     9376       -3     
==========================================
- Hits         8077     8076       -1     
+ Misses        943      942       -1     
+ Partials      359      358       -1     

Impacted Files	Coverage Δ
internal/wire/transport_parameters.go	89.30% <100.00%> (+0.68%)	⬆️

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