Remove the "TODO-CUSTOM-NAME" name on custom elements

Giving a WebAPI a JsApi.Meta.name registers that name on the global object, e.g
window['TODO-CUSTOM-NAME'] becomes a type.

src/browser/webapi/element/html/Custom.zig

@@ -241,7 +241,6 @@ pub const JsApi = struct {
     pub const bridge = js.Bridge(Custom);
 
     pub const Meta = struct {
-        pub const name = "TODO-CUSTOM-NAME";
         pub const prototype_chain = bridge.prototypeChain();
         pub var class_id: bridge.ClassId = undefined;
     };