HID: picolcd: remove unnecessary NULL test before debugfs_remove

Fix checkpatch warning:
WARNING: debugfs_remove(NULL) is safe this check is probably not required

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-picolcd_debugfs.c b/drivers/hid/hid-picolcd_debugfs.c
index 024cdf3c..3c13af6 100644
--- a/drivers/hid/hid-picolcd_debugfs.c
+++ b/drivers/hid/hid-picolcd_debugfs.c
@@ -883,16 +883,13 @@
 
 	dent = data->debug_reset;
 	data->debug_reset = NULL;
-	if (dent)
-		debugfs_remove(dent);
+	debugfs_remove(dent);
 	dent = data->debug_eeprom;
 	data->debug_eeprom = NULL;
-	if (dent)
-		debugfs_remove(dent);
+	debugfs_remove(dent);
 	dent = data->debug_flash;
 	data->debug_flash = NULL;
-	if (dent)
-		debugfs_remove(dent);
+	debugfs_remove(dent);
 	mutex_destroy(&data->mutex_flash);
 }