NZ/4419 remove validation flag

[Sun-Mountain]

Resolves #4419

Description

We no longer need the validation Launch Darkly flag. Let's use this opportunity during dev sync to practice removing LD flags from our codebase.

Significant changes or possible side effects

Automated test cases written

Given	When	Then	Type (jest, tap, cypress)
Validation LD flag	is removed	does not interrupt the application	N/A

Steps to manually verify this change

1. validation flag has been removed
2. Anything related to validation still works as normal

This pull request is ready to code review when

• Automated tests are updated (and all tests are passing)
• New automated test cases are documented above
• Pull request has been labeled, if applicable with feature, content, bug,
  tests, refactor
• Associated OpenAPI documentation has been updated
• The experience passes a basic manual accessibility audit (keyboard nav,
  screenreader, text scaling) OR an exemption is documented

This pull request is ready to test when

• Code has been reviewed by someone other than the original author

This pull request is ready to review when the QA has

• Verified the functionality related to the change
• Verified that the change works with Narrator on Windows
• Verified that the change works with VoiceOver on Mac
• Verified all updated pages with the WAVE tool
• Verified tab and keyboard navigation functionality

This pull request can be merged when

• Design has approved the experience
• Product has approved the experience

[codecov-commenter]

Codecov Report

Merging #4464 (99a07d6) into main (82959f5) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4464      +/-   ##
==========================================
- Coverage   95.13%   95.10%   -0.04%     
==========================================
  Files         314      314              
  Lines        6992     6988       -4     
  Branches     1526     1525       -1     
==========================================
- Hits         6652     6646       -6     
- Misses        334      336       +2     
  Partials        6        6              

Impacted Files	Coverage Δ
web/src/containers/Root.js	100.00% <ø> (ø)
web/src/redux/actions/flags.js	0.00% <0.00%> (-100.00%)	⬇️

Impacted Files	Coverage Δ
web/src/containers/Root.js	100.00% <ø> (ø)
web/src/redux/actions/flags.js	0.00% <0.00%> (-100.00%)	⬇️

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[cms-eapd-bot]

See this pull request in action: https://ec2-18-206-78-121.compute-1.amazonaws.com

[amyd11]

Looks like this removes the validation flag ✅

[tbolt]

Looks good. I'm surprised this is the only location it's used but I can't find any other references to it. 👍

[thetif]

looks good, I did a quick search, looks like this was the only place