* core/object_image.hh: Remove.

	* filter/object_groups_size_ratio.hh,
	* filter/object_links_bbox_w_ratio.hh,
	* filter/object_links_left_aligned.hh,
	* filter/object_links_right_aligned.hh,
	* primitive/extract/lines_h_thick_and_single.hh,
	* primitive/extract/lines_v_thick_and_single.hh,
	* primitive/link/internal/find_several_links.hh,
	* primitive/link/internal/link_several_dmax_base.hh,
	* primitive/link/with_single_up_link.hh,
	* src/debug/show_links_left_right_links_validation.cc,
	* src/primitive/find/find_discontinued_lines.cc,
	* src/primitive/find/find_pattern_lines.cc,
	* tests/filter/small_and_large_bboxes.cc,
	* src/primitive/group/group_from_double_link_filter_non_aligned.cc:
	Remove include of object_image.hh.