[PATCH inputproto multitouch] Revert addition of active_touches to device events

[Chase Douglas]

I can't remember why it's there, and I don't see how it may be useful.
If a client really wants to know how many touches are on the device,
they can listen to raw events and count the number of active touches.

(Real reason: extending events is hard :)

Signed-off-by: Chase Douglas <chase.douglas at canonical.com>
---
 XI2proto.h         |    1 -
 specs/XI2proto.txt |    6 ------
 2 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/XI2proto.h b/XI2proto.h
index 9e2c63c..2460cf5 100644
--- a/XI2proto.h
+++ b/XI2proto.h
@@ -936,7 +936,6 @@ typedef struct
     uint32_t    flags;                  /**< ::XIKeyRepeat */
     xXIModifierInfo     mods;
     xXIGroupInfo        group;
-    uint32_t    active_touches;         /**< Number of touches on source device (XI 2.1 only) */
 } xXIDeviceEvent;
 
 
diff --git a/specs/XI2proto.txt b/specs/XI2proto.txt
index 73aa52b..b0607a1 100644
--- a/specs/XI2proto.txt
+++ b/specs/XI2proto.txt
@@ -2031,11 +2031,8 @@ For a detailed description of classes, see the XIQueryDevice request.
             buttons:                    SETofBUTTONMASK
             valuators:                  SETofVALUATORMASK
             axisvalues:                 LISTofFP3232
-            active_touches*:            CARD32
     └───
 
-    * since XI 2.2
-
     BUTTONBIT { (1 << Button1), (1 << Button2), ... , (1 << ButtonN) }
     VALUATORBIT { (1 << 1), ( 1 << 2), ... ( 1 << n) }
 
@@ -2114,9 +2111,6 @@ KeyRelease, ButtonPress, ButtonRelease, Motion.
         accepted or passed on ownership.  The touch will not generate any
         further TouchUpdate events once an event with TouchPendingEnd has been
         received.
-    active_touches
-        Only in XI 2.2 and later. Only valid for TouchBegin, TouchUpdate, and
-        TouchEnd events.
 
 The active_touches value denotes the number of touches in contact with
 the source touch device surface when the event occurred. The value
-- 
1.7.4.1