Remove unneeded annotation (#12351)

Author: laurit

instrumentation/spring/spring-cloud-gateway/spring-cloud-gateway-2.2/testing/src/test/java/io/opentelemetry/instrumentation/spring/gateway/v2_2/Gateway22RouteMappingTest.java

@@ -11,11 +11,8 @@
 import io.opentelemetry.instrumentation.spring.gateway.common.AbstractRouteMappingTest;
 import io.opentelemetry.testing.internal.armeria.common.AggregatedHttpResponse;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit.jupiter.SpringExtension;
 
-@ExtendWith(SpringExtension.class)
 @SpringBootTest(
     webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
     classes = {