Enhance file and directory removal logic in VFS

- Added a check for `watch_enabled` before calling `unwatch` in the `remove_file` and `remove_dir_all` methods to prevent unnecessary operations when watching is disabled.
- Updated error handling in the `StdBackend` to include a new condition for `Generic` errors related to watch status, improving logging clarity.

These changes aim to optimize the file system operations and enhance error handling in the virtual file system.

crates/memofs/src/lib.rs

@@ -252,13 +252,17 @@ impl VfsInner {
 
     fn remove_file<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
         let path = path.as_ref();
-        let _ = self.backend.unwatch(path);
+        if self.watch_enabled {
+            let _ = self.backend.unwatch(path);
+        }
         self.backend.remove_file(path)
     }
 
     fn remove_dir_all<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
         let path = path.as_ref();
-        let _ = self.backend.unwatch(path);
+        if self.watch_enabled {
+            let _ = self.backend.unwatch(path);
+        }
         self.backend.remove_dir_all(path)
     }
 

crates/memofs/src/std_backend.rs

@@ -373,10 +373,14 @@ impl VfsBackend for StdBackend {
                 Ok(())
             }
             Err(err) => {
-                if matches!(
+                let is_not_watched = matches!(
                     err.kind,
                     notify::ErrorKind::WatchNotFound | notify::ErrorKind::PathNotFound
-                ) {
+                ) || matches!(
+                    &err.kind,
+                    notify::ErrorKind::Generic(msg) if msg.contains("No watch was found")
+                );
+                if is_not_watched {
                     log::trace!(
                         "Path was not directly watched (likely covered by parent): {}",
                         path.display()