Polish

Revert change inadvertently committed as part of gh-15017

Author: wilkinsona

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/MeterRegistryConfigurer.java

@@ -56,9 +56,6 @@ class MeterRegistryConfigurer {
 	}
 
 	void configure(MeterRegistry registry) {
-		if (registry instanceof CompositeMeterRegistry) {
-			return;
-		}
 		// Customizers must be applied before binders, as they may add custom
 		// tags or alter timer or summary configuration.
 		customize(registry);