fix(tests): 🐛 disable tests on windows

monoio/tests/fs_metadata.rs

@@ -1,8 +1,8 @@
-#[allow(unused)]
+#![cfg(unix)]
+
 use std::io::Write;
 
 #[monoio::test_all]
-#[cfg(unix)]
 async fn basic_file_metadata() {
     let mut file = tempfile::NamedTempFile::new().unwrap();
 
@@ -36,7 +36,6 @@ async fn basic_file_metadata() {
 }
 
 #[monoio::test_all]
-#[cfg(unix)]
 async fn dir_metadata() {
     let dir = tempfile::tempdir().unwrap();
 
@@ -58,7 +57,6 @@ async fn dir_metadata() {
 }
 
 #[monoio::test_all]
-#[cfg(unix)]
 async fn symlink_metadata() {
     let dir = tempfile::tempdir().unwrap();
     let link = dir.path().join("link");