chore: Fix race in collecting ICE Candidates

[kylecarbs]

This logic was flawed previously. ICE Candidates could collect
before a negotiation was triggered, which led to a race where
candidates would be lost. Candidates can no longer be lost,
and we removed some code 😎.

[codecov]

Codecov Report

Merging #76 (f477308) into main (f970e35) will increase coverage by 0.07%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##             main      #76      +/-   ##
==========================================
+ Coverage   71.88%   71.96%   +0.07%     
==========================================
  Files          88       88              
  Lines        3422     3406      -16     
  Branches       55       55              
==========================================
- Hits         2460     2451       -9     
+ Misses        753      748       -5     
+ Partials      209      207       -2     

Flag	Coverage Δ
unittest-go-macos-latest	67.40% <92.30%> (-0.05%)	⬇️
unittest-go-ubuntu-latest	69.61% <92.30%> (-0.21%)	⬇️
unittest-go-windows-latest	67.00% <92.30%> (-0.12%)	⬇️
unittest-js	78.30% <ø> (ø)

Impacted Files	Coverage Δ
peer/conn.go	76.72% <90.47%> (+0.98%)	⬆️
peer/channel.go	87.11% <100.00%> (ø)

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[bryphe-coder]

Nice catch on another race condition @kylecarbs !