Remove unused isTrunkStableFeatureEnabled from NsdService Dependencies

Currently reading trunk stable flag from mainline module is not
supported and aosp/2954910 removes util methods to read trunk stable
flag.
This CL removes unused isTrunkStableFeatureEnabled in Dependencies.

Test: TH
Change-Id: I3fca329a73c2e249cf48cd01700d719b5f46dbc2
diff --git a/service-t/src/com/android/server/NsdService.java b/service-t/src/com/android/server/NsdService.java
index 34927a6..3ae42bb 100644
--- a/service-t/src/com/android/server/NsdService.java
+++ b/service-t/src/com/android/server/NsdService.java
@@ -1880,13 +1880,6 @@
         }
 
         /**
-         * @see DeviceConfigUtils#isTrunkStableFeatureEnabled
-         */
-        public boolean isTrunkStableFeatureEnabled(String feature) {
-            return DeviceConfigUtils.isTrunkStableFeatureEnabled(feature);
-        }
-
-        /**
          * @see MdnsDiscoveryManager
          */
         public MdnsDiscoveryManager makeMdnsDiscoveryManager(