Deduplicate unsupported fs.rs for UEFI

Author: thaliaarchi

library/std/src/sys/pal/uefi/fs.rs

@@ -15,6 +15,7 @@
 
 pub mod args;
 pub mod env;
+#[path = "../unsupported/fs.rs"]
 pub mod fs;
 pub mod helpers;
 pub mod os;