apalis_imx6: remove obsolete USB_GADGET_MASS_STORAGE configuration

Remove obsolete USB_GADGET_MASS_STORAGE configuration.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/include/configs/apalis_imx6.h b/include/configs/apalis_imx6.h
index a1ba16f..7222285 100644
--- a/include/configs/apalis_imx6.h
+++ b/include/configs/apalis_imx6.h
@@ -82,8 +82,6 @@
 /* Client */
 #define CONFIG_USBD_HS
 
-#define CONFIG_USB_GADGET_MASS_STORAGE
-
 /* Framebuffer and LCD */
 #define CONFIG_VIDEO_IPUV3
 #define CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE