Removed hildon-insert-object-dialog NB#8015

Removed hildon-insert-object-dialog NB#8015

* hildon-widgets/hildon-insert-object-dialog.[ch]: removed
        * doc/tmpl/hildon-insert-object-dialog.sgml: removed
        * ut/hildon-widgets_tests.c (test27a, test27b, test27c): removed

        * hildon-widgets/Makefile.am (hildonwidgetsincludeinst_DATA)
        * hildon-widgets/Makefile.am (libhildonwidgets_la_SOURCES)
        * doc/hildon-libs-docs.sgml:
        * po/POTFILES.in: : removed reference

        * configure.ac: removed check for gnome-vfs
        * hildon-widgets/Makefile.am: removed gnome-vfs flags
        * doc/Makefile.am: likewise
        * ut/Makefile.am: likewise