SpringBoot Remove entry for OCI starter as it is no longer maintained

The project has been archived and is no longer maintained.

Comment From: philwebb

Thanks @OlgaMaciaszek !

Comment From: wilkinsona

@philwebb shouldn't this have gone into 3.1.x and later?

Comment From: philwebb

I want sure with README content. I figured most folks would only look at it on main.