ipmi: Delete an unnecessary check before the function call "cleanup_one_si"

The cleanup_one_si() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_si_intf.c

@@ -2775,9 +2775,7 @@ static int ipmi_remove(struct platform_device *dev)
 {
 	struct smi_info *info = dev_get_drvdata(&dev->dev);
 
-	if (info)
-		cleanup_one_si(info);
-
+	cleanup_one_si(info);
 	return 0;
 }