command: Move command_task() to board specific code

Move the command_task() code from the generic code to the board
specific code.  This enables more flexibility in how the board
specific code processes input.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/simulator/main.c

@@ -85,19 +85,6 @@ timer_read_time(void)
  * Turn stdin/stdout into serial console
  ****************************************************************/
 
-// XXX
-char *
-console_get_input(uint8_t *plen)
-{
-    *plen = 0;
-    return NULL;
-}
-
-void
-console_pop_input(uint8_t len)
-{
-}
-
 // Return an output buffer that the caller may fill with transmit messages
 char *
 console_get_output(uint8_t len)