Amaranth: Remove "Switch Material" feature

Since 2.8 the Shader Editor has a popover with a UIList of all materials,
much more complete than the dropdown implementation in Amaranth.

Good to see Amaranth features being replaced by built-in ones in Blender :D

amaranth/__init__.py

@@ -41,7 +41,6 @@ from amaranth.node_editor import (
     simplify_nodes,
     node_stats,
     normal_node,
-    switch_material,
     node_shader_extra,
     )
 

amaranth/node_editor/switch_material.py

-# SPDX-License-Identifier: GPL-2.0-or-later
-"""
-Material Selector
-
-Quickly switch materials in the active mesh without going to the Properties editor
-
-Based on 'Afeitadora's work on Elysiun
-http://www.elysiun.com/forum/showthread.php?290097-Dynamic-Object-Dropdown-List&p=2361851#post2361851
-
-"""
-
-import bpy
-
-def ui_node_editor_material_select(self, context):
-
-    act_ob = context.active_object
-
-    if act_ob and context.active_object.type in {'MESH', 'CURVE', 'SURFACE', 'META'} and \
-        context.space_data.tree_type == 'ShaderNodeTree' and \
-        context.space_data.shader_type == 'OBJECT':
-
-        if act_ob.active_material:
-            mat_name = act_ob.active_material.name
-        else:
-            mat_name = "No Material"
-
-        self.layout.operator_menu_enum("material.menu_select",
-                                       "material_select",
-                                        text=mat_name,
-                                       icon="MATERIAL")
-
-class AMNodeEditorMaterialSelect(bpy.types.Operator):
-    bl_idname = "material.menu_select"
-    bl_label = "Select Material"
-    bl_description = "Switch to another material in this mesh"
-
-    def avail_materials(self,context):
-        items = [(str(i),x.name,x.name, "MATERIAL", i) for i,x in enumerate(bpy.context.active_object.material_slots)]
-        return items
-    material_select: bpy.props.EnumProperty(items = avail_materials, name = "Available Materials")
-
-    @classmethod
-    def poll(cls, context):
-        return context.active_object
-
-    def execute(self,context):
-        bpy.context.active_object.active_material_index = int(self.material_select)
-        return {'FINISHED'}
-
-def register():
-    bpy.utils.register_class(AMNodeEditorMaterialSelect)
-    bpy.types.NODE_HT_header.append(ui_node_editor_material_select)
-
-def unregister():
-    bpy.utils.unregister_class(AMNodeEditorMaterialSelect)
-    bpy.types.NODE_HT_header.remove(ui_node_editor_material_select)