[grid] It seems that keep-alive works well in Passthrough, so deletin…

…g this test

java/server/test/org/openqa/selenium/grid/session/remote/PassthroughTest.java

@@ -20,7 +20,6 @@
 import static java.net.HttpURLConnection.HTTP_OK;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
 
 import com.google.common.io.ByteStreams;
 
@@ -71,22 +70,6 @@ public void shouldForwardRequestsToEndPoint() throws IOException {
     assertEquals("Cake", server.lastRequest.getHeader("x-cheese"));
   }
 
-  @Test
-  public void shouldStripKeepAliveHeader() throws IOException {
-    SessionCodec handler = new Passthrough(server.url);
-    HttpRequest req = new HttpRequest(HttpMethod.GET, "/ok");
-    req.addHeader("Keep-Alive", "timeout=600");
-    req.addHeader("Connection", "Keep-Alive, Upgrade");
-    HttpResponse resp = new HttpResponse();
-    handler.handle(req, resp);
-
-    assertNull(server.lastRequest.getHeader("keep-alive"));
-    // Not, we must set the connection to `close` in order to have the JVM avoid attempting to keep
-    // the url connection open.
-    // http://docs.oracle.com/javase/6/docs/technotes/guides/net/http-keepalive.html
-    assertEquals("close", server.lastRequest.getHeader("connection"));
-  }
-
   private static class Server {
     private final URL url;
     private final HttpServer server;