struct pcmidi_snd contains two unused members: out_substream and
out_active. They were added along the driver in commit 
3a370ca1dcf8
(HID: Prodikeys PC-MIDI HID Driver), but not used.
Drop them.
Found by https://github.com/jirislaby/clang-struct.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
 
        struct snd_card                 *card;
        struct snd_rawmidi              *rwmidi;
        struct snd_rawmidi_substream    *in_substream;
-       struct snd_rawmidi_substream    *out_substream;
        unsigned long                   in_triggered;
-       unsigned long                   out_active;
 };
 
 #define PK_QUIRK_NOGET 0x00010000