zephyr: Remove unneeded includes in machine_uart.c.

Signed-off-by: Daniel Campora <[email protected]>

Author: danicampora

ports/zephyr/machine_uart.c

@@ -33,12 +33,8 @@
 #include <zephyr/drivers/uart.h>
 
 #include "py/mperrno.h"
-#include "py/obj.h"
-#include "py/runtime.h"
-#include "py/stream.h"
 #include "py/ringbuf.h"
 #include "zephyr_device.h"
-#include "extmod/modmachine.h"
 
 
 #define MACHINE_UART_RTS                            1