Drop unnecessary jsonb dependency from spring-boot-actuator

See gh-46357

Author: philwebb

module/spring-boot-actuator/build.gradle

@@ -29,7 +29,6 @@ dependencies {
 
 	optional(project(":module:spring-boot-health"))
 	optional(project(":module:spring-boot-http-converter"))
-	optional(project(":module:spring-boot-jsonb"))
 	optional("com.github.ben-manes.caffeine:caffeine")
 	optional("com.google.code.findbugs:jsr305")
 	optional("com.zaxxer:HikariCP")