Remove the libegg implementations of EggAction and EggMenuMerge.

[David Hampton]

Log Message:
-----------
Remove the libegg implementations of EggAction and EggMenuMerge.
These have been replaced with the implementations that shipped
as part of the gtk-2.4 release.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash/lib:
        Makefile.am

Removed Files:
-------------
    gnucash/lib/egg:
        Makefile.am
        egg-accel-dialog.c
        egg-accel-dialog.h
        egg-action-group.c
        egg-action-group.h
        egg-action.c
        egg-action.h
        egg-editable-toolbar.c
        egg-editable-toolbar.h
        egg-menu-merge.c
        egg-menu-merge.h
        egg-menu.h
        egg-radio-action.c
        egg-radio-action.h
        egg-toggle-action.c
        egg-toggle-action.h
        egg-toolbar-editor.c
        egg-toolbar-editor.h
        egg-toolbars-model.c
        egg-toolbars-model.h
        eggintl.h
        eggmarshalers.c
        eggmarshalers.h
        eggmarshalers.list
        eggradiotoolbutton.c
        eggradiotoolbutton.h
        eggseparatortoolitem.c
        eggseparatortoolitem.h
        eggtoggletoolbutton.c
        eggtoggletoolbutton.h
        eggtoolbar.c
        eggtoolbar.h
        eggtoolbutton.c
        eggtoolbutton.h
        eggtoolitem.c
        eggtoolitem.h
        eggtreemodelfilter.c
        eggtreemodelfilter.h
        eggtreemultidnd.c
        eggtreemultidnd.h