chore: remove unused babel transform strict

[SimenB]

Summary

No difference in packages/*/build, so let's just remove it

Test plan

Green CI

[codecov-io]

Codecov Report

Merging #11196 (494a592) into master (4feab3e) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #11196      +/-   ##
==========================================
+ Coverage   64.28%   64.29%   +0.01%     
==========================================
  Files         308      308              
  Lines       13480    13480              
  Branches     3286     3286              
==========================================
+ Hits         8665     8667       +2     
+ Misses       4106     4105       -1     
+ Partials      709      708       -1     

Impacted Files	Coverage Δ
packages/expect/src/utils.ts	96.12% <0.00%> (+1.29%)	⬆️

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[github-actions]

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