Boost: Cleanup minify modules

[haqadn]

Proposed changes:

• Cleanup activation and per-page-load code for minify static file service.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

p1738942777652179-slack-C016BBAFHHS

Does this pull request change what data or activity we track or use?

No

Testing instructions:

• Make sure static minify files still serve correctly
• Make sure the garbage collection for minify works

[github-actions]

Thank you for your PR!

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[github-actions]

Code Coverage Summary

No summary data is avilable for parent commit f0b659c, cannot calculate coverage changes. 😴

If that commit is a feature branch rather than a trunk commit, this is expected. Otherwise, this should be updated once coverage for f0b659c is available.

Full summary · PHP report · JS report