chore: remove unused JS dependency (validator)

[arslanashraf7]

Pre-Flight checklist

What are the relevant tickets?

• Dependabot Alert
• Created this ticket in response to the Dependabot PR which bumps Bump validator from 10.11.0 to 13.7.0 #2320

What's this PR do?

Removed an unused package validator.
While looking at the dependabot PR(#2320), I noticed that the package is not used anywhere. So, instead of the bump, I've created this PR to remove this unused package.

How should this be manually tested?

• tests passing
• Reconfirming that we aren't using it anywhere, not even dynamically.

Reviewer Note:

Upon merging this PR i'll be closing #2320, since it won't be needed anymore.

[codecov-commenter]

Codecov Report

Merging #2357 (7636e37) into master (19031f3) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2357   +/-   ##
=======================================
  Coverage   88.21%   88.21%           
=======================================
  Files         330      330           
  Lines       15098    15098           
  Branches     1702     1702           
=======================================
+ Hits        13318    13319    +1     
+ Misses       1532     1531    -1     
  Partials      248      248           

Impacted Files	Coverage Δ
static/js/components/forms/BulkEnrollmentForm.js	92.18% <0.00%> (+1.56%)	⬆️

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[asadiqbal08]

👍