Pull Request for Issue # .

Summary of Changes

This pull request (PR) implements uninstalling the 3.10 EOS plugin and removing its files and folders when updating from 3.10.

The code for the new function uninstallEosPlugin has been taken from relevant parts of the existing function uninstallRepeatableFieldsPlugin, that's why names quoting is not used everywhere in the query.

Since the unquoted names will never be reserved words in any SQL dialect, it should be ok.

But if I get feedback here that I shall change that, I should change it in uninstallRepeatableFieldsPlugin, too.

For updating https://github.com/joomla/joomla-cms/blob/4.0-dev/build/deleted_file_check.php so it doesn't detect the files and folders of the eos310 plugin as to be deleted, see #34898 .

Testing Instructions

Requirement: It needs a current 3.10-dev branch which includes the 3.10 EOS plugin. The 3.10 nightly doesn't include that yet.

1. Update a current 3.10-dev branch to latest 4.0 nightly build.
   Result: See section "Actual result BEFORE applying this Pull Request" below.

2. Update a current 3.10-dev branch to the update package or custom update server provided by drone for this PR.
   Result: See section "Expected result AFTER applying this Pull Request" below.

Actual result BEFORE applying this Pull Request

After updating an installation with the current 3.10-dev branch which includes the 3.10 EOS plugin to 4.0, the plugin is still present.

Expected result AFTER applying this Pull Request

After updating an installation with the current 3.10-dev branch which includes the 3.10 EOS plugin to 4.0, the plugin is uninstalled and its files and folders have been removed.

Documentation Changes Required

None.