refactor: remove webpack v4 code

[snitin315]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

No

Motivation / Use-Case

Remove stale code

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.13% ⚠️

Comparison is base (32f62e9) 92.04% compared to head (2b8f492) 91.91%.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #4967      +/-   ##
==========================================
- Coverage   92.04%   91.91%   -0.13%     
==========================================
  Files          15       15              
  Lines        1571     1571              
  Branches      595      595              
==========================================
- Hits         1446     1444       -2     
- Misses        116      118       +2     
  Partials        9        9              

see 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.