Currently the SMS subsystem and soon the AI subsystem (by MDL-82977) both allow the creation and deletion of instances. Both instances have a delete confirmation flow to protect against accidental deletion.

The SMS subsystem requires a page reload, while the AI subsystem does it by confirmation modal.

The Modal method should be refactored into core and the SMS subsystem updated to use it. Then future admin settings where instances of things can be delete could also leverage this.

See the following commit for a proposed approach: https://github.com/safatshahin/moodle/commit/62f0e81094a54cecce166fd7d83eaffece836c52