Advanced Rogue 7: remove some unused md_ functions.

md_hasclreol() and md_sleep() were not actually portable.  If they were
needed in the future, fixing them would be possible.

arogue7/mdport.c

@@ -92,18 +92,6 @@ md_init()
 #endif
 }
 
-int
-md_hasclreol()
-{
-#ifndef	attron
-    return(!CE);
-#elif !defined(__PDCURSES__)
-    return(clr_eol != NULL);
-#else
-    return(TRUE);
-#endif
-}
-
 #ifdef	attron
 # define	_puts(s)	tputs(s, 0, md_putchar);
 # define	SO		enter_standout_mode
@@ -309,16 +297,6 @@ md_gethomedir()
     return(homedir);
 }
 
-int
-md_sleep(int s)
-{
-#ifdef _WIN32
-    _sleep(s);
-#else
-    sleep(s);
-#endif
-}
-
 char *
 md_getshell()
 {