Polish "Add observationEnabled properties for Apache Kafka"

See gh-38057

Author: scottfrederick

spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -1811,10 +1811,6 @@
       "name": "spring.kafka.jaas.control-flag",
       "defaultValue": "required"
     },
-    {
-      "name": "spring.kafka.listener.observation-enabled",
-      "defaultValue": false
-    },
     {
       "name": "spring.kafka.listener.only-log-record-metadata",
       "type": "java.lang.Boolean",
@@ -1909,10 +1905,6 @@
         "level": "error"
       }
     },
-    {
-      "name": "spring.kafka.template.observation-enabled",
-      "defaultValue": false
-    },
     {
       "name": "spring.liquibase.check-change-log-location",
       "type": "java.lang.Boolean",