window-port updates

Remove start_screen() and end_screen() from the
Window-port interface.

They were only ever used by tty, and there was a comment
carried to several window-ports about how they "really
should go away. They are tty-specific"

term_start_screen() and term_end_screen() are part of
terminal/NO_TERMS supporting routines now.

src/symbols.c

@@ -11,12 +11,12 @@ staticfn struct _savedsym *savedsym_find(const char *, int);
 extern const uchar def_r_oc_syms[MAXOCLASSES];      /* drawing.c */
 
 #if defined(TERMLIB) || defined(CURSES_GRAPHICS)
-void (*decgraphics_mode_callback)(void) = 0; /* set in tty_start_screen() */
+void (*decgraphics_mode_callback)(void) = 0; /* set in term_start_screen() */
 #endif /* TERMLIB || CURSES */
 
 #ifdef PC9800
-void (*ibmgraphics_mode_callback)(void) = 0; /* set in tty_start_screen() */
-void (*ascgraphics_mode_callback)(void) = 0; /* set in tty_start_screen() */
+void (*ibmgraphics_mode_callback)(void) = 0; /* set in term_start_screen() */
+void (*ascgraphics_mode_callback)(void) = 0; /* set in term_start_screen() */
 #endif
 #ifdef CURSES_GRAPHICS
 void (*cursesgraphics_mode_callback)(void) = 0;
@@ -25,7 +25,7 @@ void (*cursesgraphics_mode_callback)(void) = 0;
 void (*ibmgraphics_mode_callback)(void) = 0;
 #endif
 #ifdef ENHANCED_SYMBOLS
-void (*utf8graphics_mode_callback)(void) = 0; /* set in tty_start_screen and
+void (*utf8graphics_mode_callback)(void) = 0; /* set in term_start_screen and
                                                * found in unixtty,windtty,&c */
 #endif
 

src/windows.c

@@ -598,8 +598,6 @@ static struct window_procs hup_procs = {
 #endif
     hup_get_color_string,
 #endif /* CHANGE_COLOR */
-    hup_void_ndecl,                                   /* start_screen */
-    hup_void_ndecl,                                   /* end_screen */
     hup_outrip, genl_preference_update, genl_getmsghistory,
     genl_putmsghistory,
     hup_void_ndecl,                                   /* status_init */