Cleanup ariel OS todo

Author: t-moe

src/export.rs

@@ -24,15 +24,8 @@ pub fn check_outcome<T: TestOutcome>(outcome: T) -> ! {
     }
 }
 
-/*
-// TODO: Readd support for ariel os startup. Ariel OS is currently not published to crates.io
-#[cfg(feature = "ariel-os")]
-#[ariel_os::thread(autostart, stacksize = 16384)]
-fn embedded_test_thread() {
-    // TODO: make stack size configurable
-    unsafe { __embedded_test_entry() }
-}*/
-
+// Ariel OS invokes the `__embedded_test_entry` function directly
+// Otherwise we export it as `main` function.
 #[cfg_attr(not(feature = "ariel-os"), export_name = "main")]
 pub unsafe extern "C" fn __embedded_test_entry() -> ! {
     ensure_linker_file_was_added_to_rustflags();