xkb: Revert half of d42d791 XKB: Fix broken events
xkb: Revert half of d42d791 XKB: Fix broken events

The no-sequence-number attribute was not necessary to achive what commit
d42d791 did. The first field automatically goes between the
response_type and the sequence field in the header. So, adding the
xkbType field would've been sufficient to fix the broken events.

Reference-to: d42d791 XKB: Fix broken events

nbaum/xcb-proto,nbaum/xcb-proto