yanglint MAINTENANCE hide dead code

Hide part of the functionality which is not yet fully implemented.
diff --git a/tools/lint/commands.c b/tools/lint/commands.c
index bb6bf1b..58ebe96 100644
--- a/tools/lint/commands.c
+++ b/tools/lint/commands.c
@@ -461,12 +461,12 @@
     if (compiled) {
         format++;
     }
-
+#if 0
     /* tree fromat with or without gropings */
     if ((tree_opts || tree_ll) && format != LYS_OUT_TREE) {
         fprintf(stderr, "--tree options take effect only in case of the tree output format.\n");
     }
-
+#endif
     /* module, revision */
     model_name = argv[optind];
     revision = NULL;
diff --git a/tools/lint/main_ni.c b/tools/lint/main_ni.c
index 220ef33..e128649 100644
--- a/tools/lint/main_ni.c
+++ b/tools/lint/main_ni.c
@@ -243,11 +243,15 @@
         (*schema) = informat_s;
     }
 
+#if 0
     if (informat_s) {
         return 1;
     } else {
         return 2;
     }
+#else
+    return 1;
+#endif
 }
 
 int