remove unused (and IMO unnecessary) define

[r27561]

include/libfirm/typerep.h

@@ -1056,15 +1056,6 @@ int check_entity(ir_entity *ent);
  */
 int tr_vrfy(void);
 
-/**
- * If NDEBUG is defined performs nothing, else calls the tr_vrfy() function.
- */
-#ifdef NDEBUG
-#define TR_VRFY()	0
-#else
-#define TR_VRFY()	tr_vrfy()
-#endif
-
 /**
  * @page type   representation of types
  *