[libsigc++2] Remove the sigc++/object.h header

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 2b80befa1033cb99d328c149a0535cc3d40c5109
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Thu Aug 13 09:59:33 2015 +0200

    Remove the sigc++/object.h header
    
    Because it now contains no API.
    See https://bugzilla.gnome.org/show_bug.cgi?id=752560#c6

 sigc++/filelist.am |    1 -
 sigc++/object.h    |   24 ------------------------
 2 files changed, 0 insertions(+), 25 deletions(-)
---
diff --git a/sigc++/filelist.am b/sigc++/filelist.am
index ca1deca..764e83f 100644
--- a/sigc++/filelist.am
+++ b/sigc++/filelist.am
@@ -50,7 +50,6 @@ sigc_public_h =                               \
        bind.h                          \
        bind_return.h                   \
        connection.h                    \
-       object.h                        \
        reference_wrapper.h             \
        retype_return.h                 \
        signal_base.h                   \