platform/chrome: wilco_ec: remove return value check of debugfs_create_dir()

Smatch complains that:
wilco_ec_debugfs_probe() warn: 'debug_info->dir' is an error
pointer or valid

Debugfs checks are generally not supposed to be checked
for errors and it is not necessary here.

Just delete the dead code.

Signed-off-by: Zhengkang Huang <zkhuang@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20230419100303.343379-1-zkhuang@hust.edu.cn

Author: Zhengkang Huang

drivers/platform/chrome/wilco_ec/debugfs.c

@@ -251,8 +251,6 @@ static int wilco_ec_debugfs_probe(struct platform_device *pdev)
 		return 0;
 	debug_info->ec = ec;
 	debug_info->dir = debugfs_create_dir("wilco_ec", NULL);
-	if (!debug_info->dir)
-		return 0;
 	debugfs_create_file("raw", 0644, debug_info->dir, NULL, &fops_raw);
 	debugfs_create_file("h1_gpio", 0444, debug_info->dir, ec,
 			    &fops_h1_gpio);