test: revert unnecessary change

Author: diegomarquezp

sdk-platform-java/java-showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/it/ITOtelTracing.java

@@ -33,6 +33,7 @@
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertThrows;
 
+import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.gax.core.NoCredentialsProvider;
 import com.google.api.gax.retrying.RetrySettings;
 import com.google.api.gax.rpc.StatusCode;
@@ -355,71 +356,7 @@ void testTracing_retry_httpjson() throws Exception {
             .setTransportChannelProvider(
                 EchoSettings.defaultHttpJsonTransportProviderBuilder()
                     .setHttpTransport(
-                        new com.google.api.client.http.HttpTransport() {
-                          @Override
-                          protected com.google.api.client.http.LowLevelHttpRequest buildRequest(
-                              String method, String url) {
-                            return new com.google.api.client.http.LowLevelHttpRequest() {
-                              @Override
-                              public void addHeader(String name, String value) {}
-
-                              @Override
-                              public com.google.api.client.http.LowLevelHttpResponse execute() {
-                                return new com.google.api.client.http.LowLevelHttpResponse() {
-                                  @Override
-                                  public java.io.InputStream getContent() {
-                                    return new java.io.ByteArrayInputStream("{}".getBytes());
-                                  }
-
-                                  @Override
-                                  public String getContentEncoding() {
-                                    return null;
-                                  }
-
-                                  @Override
-                                  public long getContentLength() {
-                                    return 2;
-                                  }
-
-                                  @Override
-                                  public String getContentType() {
-                                    return "application/json";
-                                  }
-
-                                  @Override
-                                  public String getStatusLine() {
-                                    return "HTTP/1.1 503 Service Unavailable";
-                                  }
-
-                                  @Override
-                                  public int getStatusCode() {
-                                    return 503;
-                                  }
-
-                                  @Override
-                                  public String getReasonPhrase() {
-                                    return "Service Unavailable";
-                                  }
-
-                                  @Override
-                                  public int getHeaderCount() {
-                                    return 0;
-                                  }
-
-                                  @Override
-                                  public String getHeaderName(int index) {
-                                    return null;
-                                  }
-
-                                  @Override
-                                  public String getHeaderValue(int index) {
-                                    return null;
-                                  }
-                                };
-                              }
-                            };
-                          }
-                        })
+                        new NetHttpTransport.Builder().doNotValidateCertificate().build())
                     .setEndpoint("http://localhost:7469")
                     .build())
             .build();