Drop legacy require support

[mstoykov]

What?

Completely drop the legacy require support

Why?

Checklist

• [ ] I have performed a self-review of my code.
• [ ] I have added tests for my changes.
• [ ] I have run linter locally (make lint) and all checks pass.
• [ ] I have run tests locally (make tests) and all tests pass.
• [ ] I have commented on my code, particularly in hard-to-understand areas.

Related PR(s)/Issue(s)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 79.48718% with 8 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (requireWarning@0a37d2d). Click here to learn what that means.

:exclamation: Current head e5cf758 differs from pull request most recent head 05d8abf. Consider uploading reports for the commit 05d8abf to get more accurate results

Files	Patch %	Lines
js/bundle.go	77.77%	2 Missing and 2 partials :warning:
js/modules/resolution.go	80.00%	2 Missing and 2 partials :warning:

Additional details and impacted files

@@                Coverage Diff                @@
##             requireWarning    #3694   +/-   ##
=================================================
  Coverage                  ?   73.25%           
=================================================
  Files                     ?      275           
  Lines                     ?    20340           
  Branches                  ?        0           
=================================================
  Hits                      ?    14900           
  Misses                    ?     4489           
  Partials                  ?      951           

Flag	Coverage Δ
ubuntu	73.25% <79.48%> (?)

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