HID: remove ThingM blink(1) driver

Now that support for ThingM blink(1) was merged into the hid-led driver
the dedicated driver for this device can be removed.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>