clean master after moving of newer content to feature branch

include/global.h

@@ -360,17 +360,6 @@ struct savefile_info {
 #define PANICTRACE_GDB
 #endif
 
-/* Only CONWAY requires this at the moment, but it should be generally useful. */
-#ifdef CONWAY
-# define DROPLEVEL
-#endif
-
-#ifdef DROPLEVEL
-# define DROPLEVEL_WINDUP(fn) dropleveltempsfn = &fn;
-# define DROPLEVEL_UNWIND(held) \
-    dropleveltempsfn = held; held=0; if(dropleveltempsfn)(*dropleveltempsfn)();
-#endif
-
 /* Supply nethack_enter macro if not supplied by port */
 #ifndef nethack_enter
 #define nethack_enter(argc, argv) ((void) 0)