title: How can I disable KafkaAdmin when using spring boot
body: <p>Currently I'm using Spring boot 2.4.0 with spring-kafka.</p>
  <p>I want to use consumers and producers but not kafka admin.</p>
  <p>I tried to override <code>KafkaAdmin</code> class by settings &quot;bootstrap.servers&quot; to null, but doesn't work. It still
  'try' to connect to make KafkaAdmin and log errors. It's not fatal, but is there any way to totally disable kafka admin?</p>