Revert "allow dnn1 configuration"

This reverts commit 3455885e

charts/oai-5g-core/oai-5g-basic/config.yaml

@@ -153,7 +153,7 @@ smf:
           - dnn: "@DNN0@"
       - sNssai: *embb_slice2
         dnnSmfInfoList:
-          - dnn: "@DNN1@"
+          - dnn: "@DNN1"
   local_subscription_infos:
     - single_nssai: *embb_slice1
       dnn: "@DNN0@"
@@ -162,7 +162,7 @@ smf:
         session_ambr_ul: "200Mbps"
         session_ambr_dl: "400Mbps"
     - single_nssai: *embb_slice2
-      dnn: "@DNN1@"
+      dnn: "@DNN1"
       qos_profile:
         5qi: 2
         session_ambr_ul: "100Mbps"