remove MT-0.4 support

init.lua

@@ -68,9 +68,7 @@ minetest.register_on_leaveplayer(function(player)
 	skins.ui_context[player:get_player_name()] = nil
 end)
 
-if minetest.global_exists("player_api") then
-	-- Minetest-5 and above compatible
-	player_api.register_model("skinsdb_3d_armor_character_5.b3d", {
+player_api.register_model("skinsdb_3d_armor_character_5.b3d", {
 	animation_speed = 30,
 	textures = {
 		"blank.png",
@@ -86,24 +84,4 @@ if minetest.global_exists("player_api") then
 		walk_mine = {x=200, y=219},
 		sit = {x=81, y=160},
 	},
-	})
-else
-	-- Minetest-0.4 compatible
-	default.player_register_model("skinsdb_3d_armor_character.b3d", {
-		animation_speed = 30,
-		textures = {
-			"blank.png",
-			"blank.png",
-			"blank.png",
-			"blank.png",
-		},
-		animations = {
-			stand = {x=0, y=79},
-			lay = {x=162, y=166},
-			walk = {x=168, y=187},
-			mine = {x=189, y=198},
-			walk_mine = {x=200, y=219},
-			sit = {x=81, y=160},
-		},
-	})
-end
+})

skin_meta_api.lua

@@ -73,13 +73,9 @@ function skin_class:apply_skin_to_player(player)
 
 	local playername = player:get_player_name()
 	local ver = self:get_meta("format") or "1.0"
-	if minetest.global_exists("player_api") then
-		-- Minetest-5 compatible
+
 	player_api.set_model(player, "skinsdb_3d_armor_character_5.b3d")
-	else
-		-- Minetest-0.4 compatible
-		default.player_set_model(player, "skinsdb_3d_armor_character.b3d")
-	end
+
 	local v10_texture = "blank.png"
 	local v18_texture = "blank.png"
 	local armor_texture = "blank.png"
@@ -114,23 +110,12 @@ function skin_class:apply_skin_to_player(player)
 		end
 	end
 
-	if minetest.global_exists("player_api") then
-		-- Minetest-5 compatible
 	player_api.set_textures(player, {
 			v10_texture,
 			v18_texture,
 			armor_texture,
 			wielditem_texture,
 		})
-	else
-		-- Minetest-0.4 compatible
-		default.player_set_textures(player, {
-				v10_texture,
-				v18_texture,
-				armor_texture,
-				wielditem_texture,
-			})
-	end
 
 	player:set_properties({
 		visual_size = {