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.

win/chain/wc_trace.c

@@ -91,9 +91,6 @@ short trace_set_font_name(void *,winid, char *);
 char *trace_get_color_string(void *);
 #endif
 
-    /* other defs that really should go away (they're tty specific) */
-void trace_start_screen(void *);
-void trace_end_screen(void *);
 void trace_outrip(void *,winid, int, time_t);
 void trace_preference_update(void *,const char *);
 char *trace_getmsghistory(void *,boolean);
@@ -1011,31 +1008,6 @@ trace_get_color_string(void *vp)
 
 #endif
 
-/* other defs that really should go away (they're tty specific) */
-void
-trace_start_screen(void *vp)
-{
-    struct trace_data *tdp = vp;
-
-    fprintf(wc_tracelogf, "%sstart_screen()\n", INDENT);
-
-    PRE;
-    (*tdp->nprocs->win_start_screen)(tdp->ndata);
-    POST;
-}
-
-void
-trace_end_screen(void *vp)
-{
-    struct trace_data *tdp = vp;
-
-    fprintf(wc_tracelogf, "%send_screen()\n", INDENT);
-
-    PRE;
-    (*tdp->nprocs->win_end_screen)(tdp->ndata);
-    POST;
-}
-
 void
 trace_outrip(
     void *vp,
@@ -1245,8 +1217,6 @@ struct chain_procs trace_procs = {
     trace_get_color_string,
 #endif
 
-    trace_start_screen, trace_end_screen,
-
     trace_outrip, trace_preference_update, trace_getmsghistory,
     trace_putmsghistory,
     trace_status_init, trace_status_finish, trace_status_enablefield,