make: unifdef for _CHECK_UPDATE_H (undefined)

*** 40,58 ****
  #       include <avo/version_string.h>
  #       include <avo/util.h>            /* avo_init() */
  #       include <avo/cleanup.h>
  #endif
  
- #if defined(TEAMWARE_MAKE_CMN)
- /* This is for dmake only (not for Solaris make).
-  * Include code to check updates (dmake patches)
-  */
- #ifdef _CHECK_UPDATE_H
- #include <libAU.h>
- #endif
- #endif
- 
  #include <bsd/bsd.h>            /* bsd_signal() */
  
  #ifdef DISTRIBUTED
  #       include <dm/Avo_AcknowledgeMsg.h>
  #       include <rw/xdrstrea.h>
--- 40,49 ----