Remove an unnecessary lock

[j178]

nodeInfoMaxDelay is a const, I think it's not necessary to protect reading it.

[codecov]

Codecov Report

Merging #230 (28e4a91) into master (ac688e1) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #230      +/-   ##
==========================================
+ Coverage   84.68%   84.74%   +0.06%     
==========================================
  Files          30       30              
  Lines        5497     5494       -3     
==========================================
+ Hits         4655     4656       +1     
+ Misses        546      545       -1     
+ Partials      296      293       -3     

Impacted Files	Coverage Δ
node.go	93.67% <100.00%> (-0.03%)	⬇️
internal/recovery/sync.go	74.41% <0.00%> (-4.66%)	⬇️
hub.go	85.76% <0.00%> (ø)
client.go	85.50% <0.00%> (+0.16%)	⬆️
internal/dissolve/queue.go	100.00% <0.00%> (+5.17%)	⬆️

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[FZambia]

Hello @j178 - good catch, thanks!