Remove OCI entry as it is no longer maintained

Closes gh-39164

Author: wilkinsona

spring-boot-project/spring-boot-starters/README.adoc

@@ -187,9 +187,6 @@ do as they were designed before this was clarified.
 | https://www.optaplanner.org/[OptaPlanner]
 | https://github.com/kiegroup/optaplanner/tree/master/optaplanner-spring-integration/optaplanner-spring-boot-starter
 
-| https://www.oracle.com/cloud/[Oracle Cloud Infrastructure (OCI)]
-| https://github.com/oracle/spring-cloud-oci/tree/main/spring-cloud-oci-starters
-
 | https://spring.coherence.community/3.0.0/refdocs/reference/html/spring-boot.html[Oracle Coherence]
 | https://github.com/coherence-community/coherence-spring/tree/main/coherence-spring-boot-starter