[patch] fujitsu-laptop: simplify show_brightness_changed()

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->brightness_changed is either 0 or 1, and never a negative.  We can
just remove this code.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 2a9afa2..aa5ee98 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -444,14 +444,7 @@ static ssize_t
 show_brightness_changed(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
-
-	int ret;
-
-	ret = fujitsu->brightness_changed;
-	if (ret < 0)
-		return ret;
-
-	return sprintf(buf, "%i\n", ret);
+	return sprintf(buf, "%i\n", fujitsu->brightness_changed);
 }
 
 static ssize_t show_lcd_level(struct device *dev,
--
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