imx: ventana: config: remove redundant config

remove redundant define that exists in mx6_common.h

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/include/configs/gw_ventana.h b/include/configs/gw_ventana.h
index e11629c..8d689f1 100644
--- a/include/configs/gw_ventana.h
+++ b/include/configs/gw_ventana.h
@@ -52,9 +52,6 @@
 #define CONFIG_DM_THERMAL
 #endif
 
-/* GPIO */
-#define CONFIG_MXC_GPIO
-
 /* Thermal */
 #define CONFIG_IMX_THERMAL