Revert "Update DIAL server to be compatible with the Google Cast Chrome Extension."

We no longer have access to the Cast mdns uuid, so these changes aren't as useful.

This reverts commit 4fe07cfd2fd8db544cb053f4c6251af3abdcae7b.

Change-Id: I4650510ace9748d702f180088d4a82341cab4294
diff --git a/src/server/dial_server.c b/src/server/dial_server.c
index d31c76b..ca3ee5e 100644
--- a/src/server/dial_server.c
+++ b/src/server/dial_server.c
@@ -236,8 +236,7 @@
             "  <name>%s</name>\r\n"
             "  <options allowStop=\"%s\"/>\r\n"
             "  <state>%s</state>\r\n"
-            "%s"
-            "  <capabilities>websocket</capabilities>\r\n",
+            "%s",
             origin_header,
             DIAL_VERSION,
             app->name,