Fix a build break with cmake: remove the custom defines

that prevented hp_test2 to link in non-debug builds.

storage/heap/hp_test2.c:
  Don't try to define DBUG if we're building without
  DBUG -- that won't work,since dbug libary will be empty
  in non-debug builds and cmake.

storage/heap/hp_test2.c

@@ -15,16 +15,6 @@
 
 /* Test av isam-databas: stor test */
 
-#ifndef USE_MY_FUNC		/* We want to be able to dbug this !! */
-#define USE_MY_FUNC
-#endif
-#ifdef DBUG_OFF
-#undef DBUG_OFF
-#endif
-#ifndef SAFEMALLOC
-#define SAFEMALLOC
-#endif
-
 #include "heapdef.h"		/* Because of hp_find_block */
 #include <signal.h>