resources.conf.prod: sysmocell500 new firmware now supports TRXDv1

Change-Id: Iec50662580479bf7b6dc08d08a1de8075b2da078
diff --git a/example/resources.conf.prod b/example/resources.conf.prod
index 6de4e2e..992a694 100644
--- a/example/resources.conf.prod
+++ b/example/resources.conf.prod
@@ -96,7 +96,6 @@
     remote_user: root
     clock_reference: external
     trx_ip: 10.42.42.112
-    max_trxd_version: 0
 
 - label: OCTBTS 3500
   type: osmo-bts-octphy