Removed unused imports

spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/reactor/TraceReactorAutoConfiguration.java

@@ -32,7 +32,6 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.sleuth.instrument.async.TraceableScheduledExecutorService;
 import org.springframework.cloud.sleuth.instrument.web.TraceWebFluxAutoConfiguration;
 import org.springframework.context.ApplicationListener;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/annotation/SleuthSpanCreatorAspectFluxTests.java

@@ -18,8 +18,6 @@ package org.springframework.cloud.sleuth.annotation;
 
 import brave.Span;
 import brave.Tracer;
-import brave.Tracing;
-import brave.propagation.TraceContext;
 import brave.sampler.Sampler;
 import org.apache.commons.lang3.StringUtils;
 import org.junit.Before;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/annotation/SleuthSpanCreatorAspectMonoTests.java

@@ -18,8 +18,6 @@ package org.springframework.cloud.sleuth.annotation;
 
 import brave.Span;
 import brave.Tracer;
-import brave.Tracing;
-import brave.propagation.TraceContext;
 import brave.sampler.Sampler;
 import org.apache.commons.lang3.StringUtils;
 import org.junit.Before;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/annotation/SleuthSpanCreatorAspectTests.java

@@ -16,7 +16,6 @@
 
 package org.springframework.cloud.sleuth.annotation;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/annotation/SleuthSpanCreatorAspectWebFluxTests.java

@@ -29,7 +29,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.trace.http.HttpTrace;
 import org.springframework.boot.actuate.trace.http.HttpTraceRepository;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.web.server.LocalServerPort;
 import org.springframework.cloud.sleuth.DisableWebFluxSecurity;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/messaging/TraceContextPropagationChannelInterceptorTests.java

@@ -26,7 +26,6 @@ import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.sleuth.util.ArrayListSpanReporter;
 import org.springframework.cloud.sleuth.util.SpanUtil;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/messaging/TraceMessagingAutoConfigurationTests.java

@@ -16,8 +16,6 @@
 
 package org.springframework.cloud.sleuth.instrument.messaging;
 
-import java.util.HashMap;
-
 import brave.Tracer;
 import brave.kafka.clients.KafkaTracing;
 import brave.sampler.Sampler;
@@ -26,20 +24,14 @@ import org.apache.kafka.clients.consumer.Consumer;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.kafka.clients.producer.Producer;
 import org.aspectj.lang.ProceedingJoinPoint;
-import org.junit.Before;
-import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.BDDMockito;
 import org.mockito.Mockito;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.test.mock.mockito.MockBean;
-import org.springframework.boot.test.mock.mockito.SpyBean;
 import org.springframework.cloud.sleuth.util.ArrayListSpanReporter;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -47,7 +39,6 @@ import org.springframework.kafka.annotation.KafkaListener;
 import org.springframework.kafka.core.ConsumerFactory;
 import org.springframework.kafka.core.ProducerFactory;
 import org.springframework.kafka.listener.MessageListenerContainer;
-import org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.BDDAssertions.then;

spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/client/feign/servererrors/FeignClientServerErrorTests.java

@@ -52,7 +52,6 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.web.bind.annotation.RequestHeader;