Implement hook_uninstall to delete variables and variants

Panels Everywhere doesn't really have records of its own. You can have variants in the site_template task, but those are owned by page manager, so it never occurred to me to have PE actually remove them on uninstall.

If the contents of the pages are blank, though, it seems like you have a bigger problem than just some PE data.

Panels Everywhere tries to protect from that happenstance by never rendering the site template edit screen using itself.

If you visit admin/structure/pages/site_template that page should still render, regardless of an error on the site template. You can then disable the variant from there. I can see where actually uninstalling should remove any variants attached to the site template, though, and I'll mark the fact that it doesn't do that as a bug.

I am doing some triage on this project. This issue relates to 7.x-1.0-alpha1. No activity has ocurred on this issue for approximately 30 months. Hopefully ok to Close (works as designed).

Reopening this as it's still a valid bug - PE should remove its custom configuration upon uninstall, that's what the uninstall process is for.

This doesn't remove the variants yet, but it does delete the variables.

A D6 version of #6.

I've committed the two patches to delete the variables, I'll work on the variants shortly.

Could someone please confirm these as being the right steps to delete the variants?

1. Query {page_manager_handlers} for any records with 'task' == 'site_template'.
2. Extra the 'conf' field using unserialize(), obtain the 'did' value.
3. Delete records in {panels_display} with the did value identified above.
4. Delete records in {panels_pane} with the did value identified above.

Remove the site templates.

D6 backport.

Fixed the D7 version so it actually deletes the theme variables.

D6 backport.

Committed.