Remove unused code and deprecate hrt.prefab.Level3D

hrt/prefab/l3d/Level3D.hx

@@ -1,5 +1,6 @@
 package hrt.prefab.l3d;
 
+@:deprecated("Use hrt.prefab.Library instead")
 class Level3D extends hrt.prefab.Library {
 
 	public function new() {
@@ -7,28 +8,5 @@ class Level3D extends hrt.prefab.Library {
 		type = "level3d";
 	}
 
-	#if editor
-
-	override function edit( ctx : EditContext ) {
-		var props = new hide.Element('
-			<div class="group" name="Level">
-					<dl>
-					<dt>Width</dt><dd><input type="number" value="0" field="width"/></dd>
-					<dt>Height</dt><dd><input type="number" value="0" field="height"/></dd>
-					<dt>Grid Size</dt><dd><input type="number" value="0" field="gridSize"/></dd>
-				</dl>
-			</div>
-		');
-		ctx.properties.add(props, this, function(pname) {
-			ctx.onChange(this, pname);
-		});
-	}
-
-	override function getHideProps() : HideProps {
-		return { icon : "cube", name : "Level3D", allowParent: _ -> false};
-	}
-
-	#end
-
 	static var _ = Library.register("level3d", Level3D, "l3d");
 }