xv: Remove obsolete comments in EncodingInfo and QueryEncodings
xv: Remove obsolete comments in EncodingInfo and QueryEncodings

The padding in EncodingInfo (struct) and QueryEncodings (reply) has been
fixed upstream:
    Xvproto: fix xvEncodingInfo to match actual wire protocol
    http://cgit.freedesktop.org/xorg/proto/videoproto/commit/?id=d970512
and
    Xvproto.h: fix xvQueryEncodingsReply to match actual wire protocol
    http://cgit.freedesktop.org/xorg/proto/videoproto/commit/?id=1a96222

So, we can remove the comments.

Signed-off-by: Daniel Martin <5ae2633454ceb931c1fd86ffad586b4dfc721833@gmail.com>
Reviewed-by: Arnaud Fontaine <d0f882f2898ca2f261f3bc39cd4d1baaec5851da@debian.org>

nbaum/xcb-proto,nbaum/xcb-proto