fix(app): make per-instance launch hooks clearable (#3757)

* fix(app): make per-instance launch hooks clearable

* chore(apps/app-frontend): fix Prettier lints

packages/app-lib/src/util/mod.rs

@@ -4,15 +4,3 @@ pub mod io;
 pub mod jre;
 pub mod platform;
 pub mod server_ping;
-
-/// Wrap a builder which uses a mut reference into one which outputs an owned value
-macro_rules! wrap_ref_builder {
-    ($id:ident = $init:expr => $transform:block) => {{
-        let mut it = $init;
-        {
-            let $id = &mut it;
-            $transform;
-        }
-        it
-    }};
-}