Revert "build fix for platforms that have no LUA awareness during makedefs compile"

This reverts commit eb704832a9.

That fix was insufficient.

The addition of
    lua_State *themelua;
to the dungeon struct in dungeon.h prevents the build of host-side utilities that
include "hack.h" via the CROSSCOMPILER_HOST. Unfortunately, it is no longer possible
to cross-compile NetHack 3.7. That includes the cross-compiled MSDOS build.

include/dungeon.h

@@ -53,7 +53,6 @@ typedef struct dest_area { /* non-stairway level change identifier */
     xchar nhx, nhy;        /* opposite corner of invalid area */
 } dest_area;
 
-#ifndef MAKEDEFS_C
 typedef struct dungeon {   /* basic dungeon identifier */
     char dname[24];        /* name of the dungeon (eg. "Hell") */
     char proto[15];        /* name of prototype file (eg. "tower") */
@@ -68,7 +67,6 @@ typedef struct dungeon {   /* basic dungeon identifier */
         depth_start;       /* the starting depth in "logical" terms */
     lua_State *themelua;   /* themerms compiled lua */
 } dungeon;
-#endif /* MAKEDEFS_C */
 
 /*
  * A branch structure defines the connection between two dungeons.  They