Remove getPreix() from observation conventions

Author: sobychacko

spring-kafka/src/main/java/org/springframework/kafka/support/micrometer/KafkaListenerObservation.java

@@ -48,12 +48,6 @@ public Class<? extends ObservationConvention<? extends Context>> getDefaultConve
 			return DefaultKafkaListenerObservationConvention.class;
 		}
 
-		@Override
-		@NonNull
-		public String getPrefix() {
-			return "spring.kafka.listener";
-		}
-
 		@Override
 		@NonNull
 		public KeyName[] getLowCardinalityKeyNames() {

spring-kafka/src/main/java/org/springframework/kafka/support/micrometer/KafkaTemplateObservation.java

@@ -47,12 +47,6 @@ public Class<? extends ObservationConvention<? extends Context>> getDefaultConve
 			return DefaultKafkaTemplateObservationConvention.class;
 		}
 
-		@Override
-		@NonNull
-		public String getPrefix() {
-			return "spring.kafka.template";
-		}
-
 		@Override
 		@NonNull
 		public KeyName[] getLowCardinalityKeyNames() {