HID: hid-picolcd_core: Remove unused variable 'ret'

Fixes the following W=1 kernel build warning(s):

 drivers/hid/hid-picolcd_core.c: In function ‘picolcd_raw_event’:
 drivers/hid/hid-picolcd_core.c:332:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]

Cc: "Bruno Prémont" <bonbons@linux-vserver.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: "L. Vinyard, Jr" <rvinyard@cs.nmsu.edu>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

Author: Lee Jones

drivers/hid/hid-picolcd_core.c

@@ -329,7 +329,6 @@ static int picolcd_raw_event(struct hid_device *hdev,
 {
 	struct picolcd_data *data = hid_get_drvdata(hdev);
 	unsigned long flags;
-	int ret = 0;
 
 	if (!data)
 		return 1;
@@ -342,9 +341,9 @@ static int picolcd_raw_event(struct hid_device *hdev,
 
 	if (report->id == REPORT_KEY_STATE) {
 		if (data->input_keys)
-			ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
+			picolcd_raw_keypad(data, report, raw_data+1, size-1);
 	} else if (report->id == REPORT_IR_DATA) {
-		ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
+		picolcd_raw_cir(data, report, raw_data+1, size-1);
 	} else {
 		spin_lock_irqsave(&data->lock, flags);
 		/*