[gnome-settings-daemon] common: Remove button passive grab helper

[Carlos Garnacho <carlosg src gnome org>]

commit 8a720e45110b00a5d79aeaeaff783c069241afe2
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Feb 11 16:47:08 2017 +0100

    common: Remove button passive grab helper
    
    It's now unused, since pad button handling is done in mutter.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773958

 plugins/common/Makefile.am   |    2 -
 plugins/common/gsd-keygrab.c |   80 ------------------------------------------
 plugins/common/gsd-keygrab.h |   34 ------------------
 3 files changed, 0 insertions(+), 116 deletions(-)
---
diff --git a/plugins/common/Makefile.am b/plugins/common/Makefile.am
index 8282cf1..239c601 100644
--- a/plugins/common/Makefile.am
+++ b/plugins/common/Makefile.am
@@ -31,8 +31,6 @@ libcommon_la_SOURCES = \
        gsd-device-manager-x11.h  \
        gsd-device-mapper.c     \
        gsd-device-mapper.h     \
-       gsd-keygrab.c           \
-       gsd-keygrab.h           \
        gsd-input-helper.c      \
        gsd-input-helper.h      \
        gsd-settings-migrate.c  \