Remove an unused icon and constant in Tree

doc/classes/Tree.xml

@@ -403,8 +403,6 @@
 		</theme_item>
 		<theme_item name="guide_color" type="Color" default="Color( 0, 0, 0, 0.1 )">
 		</theme_item>
-		<theme_item name="guide_width" type="int" default="2">
-		</theme_item>
 		<theme_item name="hseparation" type="int" default="4">
 		</theme_item>
 		<theme_item name="item_margin" type="int" default="12">

editor/editor_themes.cpp

@@ -690,7 +690,6 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	theme->set_icon("arrow_collapsed", "Tree", theme->get_icon("GuiTreeArrowRight", "EditorIcons"));
 	theme->set_icon("updown", "Tree", theme->get_icon("GuiTreeUpdown", "EditorIcons"));
 	theme->set_icon("select_arrow", "Tree", theme->get_icon("GuiDropdown", "EditorIcons"));
-	theme->set_icon("select_option", "Tree", theme->get_icon("GuiTreeOption", "EditorIcons"));
 	theme->set_stylebox("bg_focus", "Tree", style_focus);
 	theme->set_stylebox("custom_button", "Tree", make_empty_stylebox());
 	theme->set_stylebox("custom_button_pressed", "Tree", make_empty_stylebox());
@@ -704,7 +703,6 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	theme->set_color("drop_position_color", "Tree", accent_color);
 	theme->set_constant("vseparation", "Tree", (extra_spacing + default_margin_size) * EDSCALE);
 	theme->set_constant("hseparation", "Tree", (extra_spacing + default_margin_size) * EDSCALE);
-	theme->set_constant("guide_width", "Tree", border_width);
 	theme->set_constant("item_margin", "Tree", 3 * default_margin_size * EDSCALE);
 	theme->set_constant("button_margin", "Tree", default_margin_size * EDSCALE);
 	theme->set_constant("draw_relationship_lines", "Tree", relationship_line_opacity >= 0.01);

editor/icons/icon_GUI_tree_option.svg

@@ -1,5 +0,0 @@
-<svg width="14" height="14" version="1.1" viewBox="0 0 14 14" xmlns="http://www.w3.org/2000/svg">
-<g transform="translate(0 -1038.4)">
-<path transform="translate(0 1038.4)" d="m7.5 1a1.5 1.5 0 0 0 -1.5 1.5 1.5 1.5 0 0 0 1.5 1.5 1.5 1.5 0 0 0 1.5 -1.5 1.5 1.5 0 0 0 -1.5 -1.5zm0 5a1.5 1.5 0 0 0 -1.5 1.5 1.5 1.5 0 0 0 1.5 1.5 1.5 1.5 0 0 0 1.5 -1.5 1.5 1.5 0 0 0 -1.5 -1.5zm0 5a1.5 1.5 0 0 0 -1.5 1.5 1.5 1.5 0 0 0 1.5 1.5 1.5 1.5 0 0 0 1.5 -1.5 1.5 1.5 0 0 0 -1.5 -1.5z" fill="#fff" fill-opacity=".58824" stroke-linejoin="round" stroke-opacity=".39216" stroke-width="2"/>
-</g>
-</svg>

scene/gui/tree.cpp

@@ -914,7 +914,6 @@ void Tree::update_cache() {
 	cache.arrow_collapsed = get_icon("arrow_collapsed");
 	cache.arrow = get_icon("arrow");
 	cache.select_arrow = get_icon("select_arrow");
-	cache.select_option = get_icon("select_option");
 	cache.updown = get_icon("updown");
 
 	cache.custom_button = get_stylebox("custom_button");
@@ -930,7 +929,6 @@ void Tree::update_cache() {
 	cache.vseparation = get_constant("vseparation");
 	cache.item_margin = get_constant("item_margin");
 	cache.button_margin = get_constant("button_margin");
-	cache.guide_width = get_constant("guide_width");
 	cache.draw_guides = get_constant("draw_guides");
 	cache.draw_relationship_lines = get_constant("draw_relationship_lines");
 	cache.relationship_line_color = get_color("relationship_line_color");

scene/gui/tree.h

@@ -416,7 +416,6 @@ private:
 		Ref<Texture> arrow_collapsed;
 		Ref<Texture> arrow;
 		Ref<Texture> select_arrow;
-		Ref<Texture> select_option;
 		Ref<Texture> updown;
 
 		Color font_color;
@@ -429,7 +428,6 @@ private:
 		int hseparation;
 		int vseparation;
 		int item_margin;
-		int guide_width;
 		int button_margin;
 		Point2 offset;
 		int draw_relationship_lines;

scene/resources/default_theme/default_theme.cpp

@@ -657,7 +657,6 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 
 	theme->set_constant("hseparation", "Tree", 4 * scale);
 	theme->set_constant("vseparation", "Tree", 4 * scale);
-	theme->set_constant("guide_width", "Tree", 2 * scale);
 	theme->set_constant("item_margin", "Tree", 12 * scale);
 	theme->set_constant("button_margin", "Tree", 4 * scale);
 	theme->set_constant("draw_relationship_lines", "Tree", 0);