[glibmm] Remove unused helperlist.h

[Murray Cumming <murrayc src gnome org>]

commit 49d87dbb3043a4ec893307efe1ee694021b78ce2
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Mar 20 10:01:07 2017 +0100

    Remove unused helperlist.h

 glib/glibmm.h            |    1 -
 glib/glibmm/filelist.am  |    1 -
 glib/glibmm/helperlist.h |  152 ----------------------------------------------
 3 files changed, 0 insertions(+), 154 deletions(-)
---
diff --git a/glib/glibmm.h b/glib/glibmm.h
index 99c93d9..afe7712 100644
--- a/glib/glibmm.h
+++ b/glib/glibmm.h
@@ -104,7 +104,6 @@
 #include <glibmm/exception.h>
 #include <glibmm/exceptionhandler.h>
 #include <glibmm/fileutils.h>
-#include <glibmm/helperlist.h>
 #include <glibmm/interface.h>
 #include <glibmm/iochannel.h>
 #include <glibmm/init.h>
diff --git a/glib/glibmm/filelist.am b/glib/glibmm/filelist.am
index 1154feb..76ed885 100644
--- a/glib/glibmm/filelist.am
+++ b/glib/glibmm/filelist.am
@@ -48,7 +48,6 @@ glibmm_files_extra_h =                        \
        exception.h                     \
        exceptionhandler.h              \
        extraclassinit.h                \
-       helperlist.h                    \
        i18n-lib.h                      \
        i18n.h                          \
        init.h                          \