An obsolete file in the eLearning area was removed after it accidentally reappeared during code consolidation. This cleanup helps avoid confusion and keeps the module aligned with the current implementation, with no expected impact on users.

Was introduced at f6cb0f2308 which was part of #27353
The file was renamed but the original changes are no longer needed (was
odoo-dev/odoo@b9cd8a571277 and odoo-dev/odoo@d3c964d9b1 which cancel each other)
During rebase and squash, the previous version of the file reappear.
Remove it

This change removes an unnecessary website editor dependency from the salary contract setup area. It helps keep the HR contract salary feature lighter and avoids loading an unrelated component that is not needed for normal business use.

Following https://github.com/odoo/odoo/pull/29775