HID: prodikeys: remove unused variable

'key' is set but never used in the first loop. So remove the set.

And indent the re-set of pm->last_key properly.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-prodikeys.c

@@ -395,7 +395,6 @@ static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
 
 	/* break keys */
 	for (bit_index = 0; bit_index < 24; bit_index++) {
-		key = pm->last_key[bit_index];
 		if (!((0x01 << bit_index) & bit_mask)) {
 			input_event(pm->input_ep82, EV_KEY,
 				pm->last_key[bit_index], 0);