1 files changed, 0 insertions, 2 deletions
diff --git a/src/etc.c b/src/etc.c
index 10aba12a0..73cf31087 100644
--- a/src/etc.c
+++ b/src/etc.c
@@ -183,8 +183,6 @@ mrb_obj_id(mrb_value obj)
   case  MRB_TT_MATCH:
   case  MRB_TT_FILE:
   case  MRB_TT_DATA:
-  case  MRB_TT_THREAD:
-  case  MRB_TT_THREADGRP:
   default:
     return MakeID(obj.value.p);
   }