Fix checkstyle

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/web/reactive/function/client/ServletOAuth2AuthorizedClientExchangeFilterFunctionTests.java

@@ -55,7 +55,6 @@ import org.springframework.security.oauth2.client.web.OAuth2AuthorizedClientRepo
 import org.springframework.security.oauth2.core.OAuth2AccessToken;
 import org.springframework.security.oauth2.core.OAuth2RefreshToken;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
-import org.springframework.security.oauth2.core.endpoint.TestOAuth2AccessTokenResponses;
 import org.springframework.security.oauth2.core.user.OAuth2User;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.context.request.ServletRequestAttributes;