fix ut

spring-cloud-starter-tencent-metadata-transfer/src/test/java/com/tencent/cloud/metadata/core/TransHeadersTransferTest.java

@@ -31,7 +31,6 @@ import org.junit.jupiter.api.extension.ExtendWith;
 
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.http.HttpMethod;
-import org.springframework.mock.http.client.MockClientHttpRequest;
 import org.springframework.mock.http.server.reactive.MockServerHttpRequest;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.test.context.junit.jupiter.SpringExtension;