SpringBoot Remove hints for Spring Integration Graph

Related to: https://github.com/spring-projects/spring-integration/issues/3994

Spring Integration's IntegrationGraphServer can be used without actuator or even Spring Boot at all. That is more natural to have respective reflection hints exposed by Spring Integration itself. See related GH issue and its fix which just does a migration of the remove code from IntegrationGraphEndpoint

Comment From: wilkinsona

Switching to a task as this change combined with the Spring Integration change should have no noticeable effect for Boot users.

Comment From: wilkinsona

We need to move to Spring Integration snapshots (https://github.com/spring-projects/spring-boot/issues/34039) first. We should do that late next week in advance of the release train starting the following week.