remove the box frame pieces, all pieces are of the extended lineage

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

src/frames/pieces/front-or-back-windowed.scad

@@ -0,0 +1,35 @@
+/*
+ * SPDX-FileCopyrightText: © 2024 Brian S. Stephan <bss@incorporeal.org>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+include <parameters.scad>
+include <components.scad>
+use <front-or-back.scad>
+use <front-or-back-inner-wall.scad>
+
+module front_or_back_window() {
+	translate([0, -frame_y/2, 0])
+		cube([frame_x-frame_mount_column_width*3.5, (frame_wall+panel_support_width)*2,
+			frame_z-panel_z*3], center=true);
+}
+
+module windowed_front_or_back_frame_piece() {
+	difference() {
+		front_or_back_frame_piece();
+		// subtract frame wall window
+		front_or_back_window();
+		// subtract the inner wall area that will be provided by the other piece
+		front_or_back_inner_wall_frame_piece();
+	}
+}
+
+module windowed_front_or_back_frame_piece_for_extended_side() {
+	difference() {
+		windowed_front_or_back_frame_piece();
+		// ...minus the frame wall and lip on the left
+		translate([-frame_x/2+frame_wall/2, 0, 0]) cube([frame_wall, frame_y, frame_z], center=true);
+	}
+}
+
+windowed_front_or_back_frame_piece_for_extended_side();