MXC: remove orphan imx_init_uart() definition

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/include/mach/imx-uart.h

@@ -27,6 +27,4 @@ struct imxuart_platform_data {
 	unsigned int flags;
 };
 
-int __init imx_init_uart(int uart_no, struct imxuart_platform_data *pdata);
-
 #endif