chore(utils): remove a bunch of unused utils

Quick links (staging server): Site	Admin	Wizard

Login: ssh owid@staging-site-remove-utils

Site-screenshots: https://github.com/owid/site-screenshots/compare/remove-utils
SVG tester: https://github.com/owid/owid-grapher-svgs/compare/remove-utils

SVG tester:

Number of differences (default views): 0 ✅ Number of differences (all views): 0 ✅

Edited: 2024-06-24 13:36:06 UTC Execution time: 1.12 seconds

owid / owid-grapher