Removes classes and methods that were deprecated before version 20.8.

[enricobattocchi]

Context

Summary

This PR can be summarized in the following changelog entry:

• Removes classes and methods that were deprecated before version 20.8.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Just a general smoke test, since we are removing code which is not used anymore

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes #

[thijsoo]

CR + ACC 👍

[coveralls]

Pull Request Test Coverage Report for Build dacceccdad05ceba67f2b70eb899b477246dac1a

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 698 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 52.642%

---

Files with Coverage Reduction	New Missed Lines	%
src/generated/container.php	698	0.0%

Totals
Change from base Build 74678cf688db4950727dd368eaf397a1a15a4992:	0.02%
Covered Lines:	28308
Relevant Lines:	54394

---

💛 - Coveralls

[hardikgohil7988]

@oksanayoast @tatasha2004
For this PR I've smoke tested the Free plugin.