Remove unnecessary generic type arguments

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175155365

java/google/registry/rdap/RdapNameserverSearchAction.java

@@ -131,7 +131,7 @@ public class RdapNameserverSearchAction extends RdapActionBase {
         jsonBuilder,
         BoilerplateType.NAMESERVER,
         results.getIncompletenessWarnings(),
-        ImmutableList.<ImmutableMap<String, Object>>of(),
+        ImmutableList.of(),
         fullServletPath);
     return jsonBuilder.build();
   }