hw/display/tc6393xb: Remove unused functions

No code used the tc6393xb_gpio_in_get() and tc6393xb_gpio_out_set()
functions since their introduction in commit 88d2c950. Time to
remove them.
Suggested-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190412165416.7977-4-philmd@redhat.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/display/tc6393xb.c

@@ -137,11 +137,6 @@ struct TC6393xbState {
              blanked : 1;
 };
 
-qemu_irq *tc6393xb_gpio_in_get(TC6393xbState *s)
-{
-    return s->gpio_in;
-}
-
 static void tc6393xb_gpio_set(void *opaque, int line, int level)
 {
 //    TC6393xbState *s = opaque;
@@ -154,17 +149,6 @@ static void tc6393xb_gpio_set(void *opaque, int line, int level)
     // FIXME: how does the chip reflect the GPIO input level change?
 }
 
-void tc6393xb_gpio_out_set(TC6393xbState *s, int line,
-                    qemu_irq handler)
-{
-    if (line >= TC6393XB_GPIOS) {
-        fprintf(stderr, "TC6393xb: no GPIO pin %d\n", line);
-        return;
-    }
-
-    s->handler[line] = handler;
-}
-
 static void tc6393xb_gpio_handler_update(TC6393xbState *s)
 {
     uint32_t level, diff;

include/hw/devices.h

@@ -54,9 +54,6 @@ void retu_key_event(void *retu, int state);
 typedef struct TC6393xbState TC6393xbState;
 TC6393xbState *tc6393xb_init(struct MemoryRegion *sysmem,
                              uint32_t base, qemu_irq irq);
-void tc6393xb_gpio_out_set(TC6393xbState *s, int line,
-                    qemu_irq handler);
-qemu_irq *tc6393xb_gpio_in_get(TC6393xbState *s);
 qemu_irq tc6393xb_l3v_get(TC6393xbState *s);
 
 #endif