Removed unsued imports

Author: spencergibb

binders/kafka-binder/spring-cloud-stream-binder-kafka-core/src/main/java/org/springframework/cloud/stream/binder/kafka/properties/KafkaBinderConfigurationProperties.java

@@ -46,7 +46,6 @@
 import org.springframework.core.io.Resource;
 import org.springframework.expression.Expression;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 

binders/kafka-binder/spring-cloud-stream-binder-kafka/src/test/java/org/springframework/cloud/stream/binder/kafka/bootstrap/KafkaBinderBootstrapTest.java

@@ -16,7 +16,6 @@
 
 package org.springframework.cloud.stream.binder.kafka.bootstrap;
 
-import java.beans.BeanProperty;
 import java.util.function.Function;
 
 import org.junit.jupiter.api.BeforeAll;