Remove unused files.

Remove unused files.

	* shell/ev-page-view.c:
        * shell/ev-page-view.h:

        Remove unused files.

        * shell/ev-sidebar-thumbnails.c:
        (ev_sidebar_thumbnails_set_document):
        * shell/ev-sidebar.c: (ev_sidebar_set_document),
        (ev_sidebar_supports_document):
        * shell/ev-sidebar.h:
        * shell/ev-window.c: (ev_window_setup_document):

        Doesn't show thumbnails if document has 1 page. Make
        sidebar menu entries sensitive only if if they have
        sense. Fix bug 164811.