refactor: remove invariant

[simenandre]

No description provided.

[codecov]

Codecov Report

Merging #216 (fce206b) into main (0982baf) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #216   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         4    -1     
  Lines           97        94    -3     
  Branches         9         8    -1     
=========================================
- Hits            97        94    -3     

Impacted Files	Coverage Δ
src/slack.module.ts	100.00% <100.00%> (ø)
src/slack.service.ts	100.00% <100.00%> (ø)

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