Simplify injection points declaration

This commit simplifies the generics used for SessionRepository and
FindByIdNameSessionRepository as their type signatures already declare
that `S` extends from `Session`.

See gh-39751

Author: snicoll

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/session/SessionsEndpointAutoConfiguration.java

@@ -54,8 +54,8 @@ static class ServletSessionEndpointConfiguration {
 
 		@Bean
 		@ConditionalOnMissingBean
-		SessionsEndpoint sessionEndpoint(SessionRepository<? extends Session> sessionRepository,
-				ObjectProvider<FindByIndexNameSessionRepository<? extends Session>> indexedSessionRepository) {
+		SessionsEndpoint sessionEndpoint(SessionRepository<?> sessionRepository,
+				ObjectProvider<FindByIndexNameSessionRepository<?>> indexedSessionRepository) {
 			return new SessionsEndpoint(sessionRepository, indexedSessionRepository.getIfAvailable());
 		}
 
@@ -68,8 +68,8 @@ static class ReactiveSessionEndpointConfiguration {
 
 		@Bean
 		@ConditionalOnMissingBean
-		ReactiveSessionsEndpoint sessionsEndpoint(ReactiveSessionRepository<? extends Session> sessionRepository,
-				ObjectProvider<ReactiveFindByIndexNameSessionRepository<? extends Session>> indexedSessionRepository) {
+		ReactiveSessionsEndpoint sessionsEndpoint(ReactiveSessionRepository<?> sessionRepository,
+				ObjectProvider<ReactiveFindByIndexNameSessionRepository<?>> indexedSessionRepository) {
 			return new ReactiveSessionsEndpoint(sessionRepository, indexedSessionRepository.getIfAvailable());
 		}