drivers/aspeed/ast2050: Remove variable set but not used

Change-Id: Iedda92edf8c4eb7be037dcc0faa6fe8aa0c0754c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32945
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/drivers/aspeed/ast2050/ast2050.c b/src/drivers/aspeed/ast2050/ast2050.c
index 631372d..21af5c7 100644
--- a/src/drivers/aspeed/ast2050/ast2050.c
+++ b/src/drivers/aspeed/ast2050/ast2050.c
@@ -37,13 +37,12 @@
 
 static void aspeed_ast2050_init(struct device *dev)
 {
-	u8 ret;
 	struct drm_device drm_dev;
 
 	drm_dev.pdev = dev;
 
 	printk(BIOS_INFO, "ASpeed AST2050: initializing video device\n");
-	ret = ast_driver_load(&drm_dev, 0);
+	ast_driver_load(&drm_dev, 0);
 
 	/* Unlock extended configuration registers */
 	outb(0x80, 0x3d4); outb(0xa8, 0x3d5);