Remove component from Redux testing

[imnasnainaec]

Also fix i18n import for Captcha to make testing easier.

Prereq for #3836

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This change is 

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 74.30%. Comparing base (274ed14) to head (e6f0338).
⚠️ Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
src/components/Login/Captcha.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3881      +/-   ##
==========================================
- Coverage   74.41%   74.30%   -0.11%     
==========================================
  Files         287      287              
  Lines       10669    10669              
  Branches     1331     1331              
==========================================
- Hits         7939     7928      -11     
- Misses       2344     2355      +11     
  Partials      386      386              

Flag	Coverage Δ
backend	85.48% <ø> (ø)
frontend	65.82% <0.00%> (-0.19%)	⬇️

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[jasonleenaylor]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)