remove MRB_TT_THREAD,MRB_TT_THREADGRP

include/mruby.h

@@ -60,9 +60,7 @@ enum mrb_vtype {
   MRB_TT_FILE,        /*  21 */
   MRB_TT_ENV,         /*  22 */
   MRB_TT_DATA,        /*  23 */
-  MRB_TT_THREAD,      /*  24 */
-  MRB_TT_THREADGRP,   /*  25 */
-  MRB_TT_MAXDEFINE    /*  26 */
+  MRB_TT_MAXDEFINE    /*  24 */
 };
 
 typedef struct mrb_value {

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);
   }