remove unused code

Author: laurit

instrumentation-api-incubator/javaagent-testing/src/test/java/io/opentelemetry/instrumentation/api/incubator/semconv/http/HttpClientUrlTemplateCustomizerTest.java

@@ -9,7 +9,6 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.api.trace.SpanKind;
-import io.opentelemetry.instrumentation.testing.internal.AutoCleanupExtension;
 import io.opentelemetry.instrumentation.testing.junit.AgentInstrumentationExtension;
 import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
 import io.opentelemetry.instrumentation.testing.junit.http.HttpClientTestServer;
@@ -24,8 +23,6 @@
 class HttpClientUrlTemplateCustomizerTest {
   private static HttpClientTestServer server;
 
-  @RegisterExtension static final AutoCleanupExtension cleanup = AutoCleanupExtension.create();
-
   @RegisterExtension
   static InstrumentationExtension testing = AgentInstrumentationExtension.create();