[glibmm] Revert "Added Gio::ListModel"

[Murray Cumming <murrayc src gnome org>]

commit 6259a46e8b7599df27adf7a21c943b0479b93bab
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Sep 20 16:46:38 2015 +0200

    Revert "Added Gio::ListModel"
    
    Because it is not ready yet.
    This reverts commit dd19e282d249dc6009834dad9c2af99039675348.

 gio/giomm.h           |    1 -
 gio/src/filelist.am   |    1 -
 gio/src/listmodel.ccg |   23 ------------
 gio/src/listmodel.hg  |   96 -------------------------------------------------
 4 files changed, 0 insertions(+), 121 deletions(-)
---
diff --git a/gio/giomm.h b/gio/giomm.h
index 1811973..43f6ed5 100644
--- a/gio/giomm.h
+++ b/gio/giomm.h
@@ -89,7 +89,6 @@
 #include <giomm/initable.h>
 #include <giomm/inputstream.h>
 #include <giomm/iostream.h>
-#include <giomm/listmodel.h>
 #include <giomm/loadableicon.h>
 #include <giomm/memoryinputstream.h>
 #include <giomm/memoryoutputstream.h>
diff --git a/gio/src/filelist.am b/gio/src/filelist.am
index e47b6b2..0f494e4 100644
--- a/gio/src/filelist.am
+++ b/gio/src/filelist.am
@@ -74,7 +74,6 @@ giomm_files_any_hg =                  \
        initable.hg                     \
        inputstream.hg                  \
        iostream.hg                     \
-       listmodel.hg                    \
        loadableicon.hg                 \
        memoryinputstream.hg            \
        memoryoutputstream.hg           \