[grid] Removing unused import
[skip ci]
import com.google.common.io.CountingOutputStream;
import com.google.common.io.FileBackedOutputStream;
+
import org.openqa.selenium.Capabilities;
import org.openqa.selenium.ImmutableCapabilities;
import org.openqa.selenium.Proxy;
import static com.google.common.net.HttpHeaders.CONTENT_LENGTH;
import static com.google.common.net.HttpHeaders.CONTENT_TYPE;
-import static com.google.common.net.HttpHeaders.WARNING;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.openqa.selenium.json.Json.JSON_UTF_8;
import static org.openqa.selenium.remote.CapabilityType.PROXY;
