Revert DIAG dup2 logging (refresh confirmed working euid=0)

src/syscall/fs.rs

@@ -322,25 +322,7 @@ pub fn dup2(
         if buf.is_empty() {
             return Ok(new_fd);
         }
-        let dbg_euid = {
-            let cur = context::current();
-            let g = cur.read(token.token());
-            g.euid
-        };
-        let new_file = match duplicate_file(fd, buf, false, token) {
-            Ok(f) => {
-                warn!("DIAG dup2-self-buf euid={dbg_euid} fd={} duplicate_file=OK", fd.get());
-                f
-            }
-            Err(e) => {
-                warn!(
-                    "DIAG dup2-self-buf euid={dbg_euid} fd={} duplicate_file=ERR errno={}",
-                    fd.get(),
-                    e.errno
-                );
-                return Err(e);
-            }
-        };
+        let new_file = duplicate_file(fd, buf, false, token)?;
         let old_file = {
             let current_lock = context::current();
             let mut current = current_lock.read(token.token());