chore: remove unused dependencies

[dnalborczyk]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

[github-actions]

Thank you for your contribution! ❤️

You can try out this pull request locally by installing Rollup via

npm install dnalborczyk/rollup#rem-unused-deps

or load it into the REPL:
https://rollupjs.org/repl/?pr=4072

[codecov]

Codecov Report

Merging #4072 (4947541) into master (6cc9d6b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4072   +/-   ##
=======================================
  Coverage   97.49%   97.49%           
=======================================
  Files         193      193           
  Lines        6821     6821           
  Branches     2006     2006           
=======================================
  Hits         6650     6650           
  Misses         84       84           
  Partials       87       87           

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