char: remove unused qemu_chr_fe_event

I introduced this function in d61b0c9, but it isn't
used. Furthermore, it was incomplete, as it would need to translate QEMU
chr events to Spice port events.

(presumably it was used in the follow-up NBD-spice series that was not
completed: http://lists.gnu.org/archive/html/qemu-devel/2013-11/msg02024.html)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-4-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/sysemu/char.h

@@ -103,7 +103,6 @@ struct CharDriverState {
     void (*chr_accept_input)(struct CharDriverState *chr);
     void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
     void (*chr_set_fe_open)(struct CharDriverState *chr, int fe_open);
-    void (*chr_fe_event)(struct CharDriverState *chr, int event);
     CharBackend *be;
     void *opaque;
     char *label;
@@ -238,16 +237,6 @@ void qemu_chr_fe_set_echo(CharBackend *be, bool echo);
  */
 void qemu_chr_fe_set_open(CharBackend *be, int fe_open);
 
-/**
- * @qemu_chr_fe_event:
- *
- * Send an event from the front end to the back end. It does nothing
- * without associated CharDriver.
- *
- * @event the event to send
- */
-void qemu_chr_fe_event(CharBackend *be, int event);
-
 /**
  * @qemu_chr_fe_printf:
  *

qemu-char.c

@@ -4226,15 +4226,6 @@ void qemu_chr_fe_set_open(CharBackend *be, int fe_open)
     }
 }
 
-void qemu_chr_fe_event(CharBackend *be, int event)
-{
-    CharDriverState *chr = be->chr;
-
-    if (chr && chr->chr_fe_event) {
-        chr->chr_fe_event(chr, event);
-    }
-}
-
 guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
                             GIOFunc func, void *user_data)
 {

spice-qemu-char.c

@@ -236,15 +236,6 @@ static void spice_port_set_fe_open(struct CharDriverState *chr, int fe_open)
 #endif
 }
 
-static void spice_chr_fe_event(struct CharDriverState *chr, int event)
-{
-#if SPICE_SERVER_VERSION >= 0x000c02
-    SpiceCharDriver *s = chr->opaque;
-
-    spice_server_port_event(&s->sin, event);
-#endif
-}
-
 static void print_allowed_subtypes(void)
 {
     const char** psubtype;
@@ -292,7 +283,6 @@ static CharDriverState *chr_open(const char *subtype,
     chr->chr_free = spice_chr_free;
     chr->chr_set_fe_open = set_fe_open;
     chr->explicit_be_open = true;
-    chr->chr_fe_event = spice_chr_fe_event;
     chr->chr_accept_input = spice_chr_accept_input;
 
     QLIST_INSERT_HEAD(&spice_chars, s, next);