Context 7.x-3.3
Metatag 7.x-1.3
Disable Field UI for the production environment.

This will add the Field UI module to the Tadaa! configuration in order to enable it for the development and staging environments, but disable it for the production environment.

Run update.php in order to apply the new Tadaa! configuration and to automatically enable/disable the module, depending on the current environment.

Make sure that every feature is in the default state after the update. If a contrib module depends on the Field UI module (unlikely), you will need to manually revert the Tadaa! configuration in order to keep the Field UI module enabled for every environment.
Removed the dependency to the PHP module.

It's often bad practise to use the PHP filter, so we shouldn't encourage people to use it.

Existing sites won't be effected since some sites actually needs this module.

However, you should disable it for existing sites if it's possible. If it is possible, you should also add the Bad Judgement module to the Tadaa! configuration in order to enable it for the environments where Letmein is enabled.
Disabled the Overlay module.

Run update.php in order to disable it for existing sites.

If the site actually requires it, you should enable it manually again. If it doesn't you should uninstall the module completely, as this doesn't happen automatically.
Disable the Update manager module for staging and production.

Run update.php in order to apply the Tadaa! configuration for existing sites. Make sure to verify that every feature is in the default state after the update.
Bumped the versions number for Odd Drupal and Odd Vault.