Clean empty old API files

[jolelievre]

Questions	Answers
Branch?	develop
Description?	Clean empty old API files, probably left after some incorrect merge or conflict resolve
Type?	bug fix
Category?	BO
BC breaks?	no
Deprecations?	no
How to test?	~
UI Tests	CI green
Fixed issue or discussion?	~
Related PRs	~
Sponsor company	~

[prestonBot]

Hi, thanks for this contribution!

I found some issues with the Pull Request description:

• Your pull request does not seem to fix any issue, consider creating one (see note below) and linking it by writing Fixes #1234.

Would you mind having a look at it? This will help us understand how interesting your contribution is, thank you very much!

About linked issues

Please consider opening an issue before submitting a Pull Request:

• If it's a bug fix, it helps maintainers verify that the bug is effectively due to a defect in the code, and that it hasn't been fixed already.
• It can help trigger a discussion about the best implementation path before a single line of code is written.
• It may lead the Core Product team to mark that issue as a priority, further attracting the maintainers' attention.

(Note: this is an automated message, but answering it will reach a real human)