diff --git a/sys/fds.go b/sys/fds.go
deleted file mode 100644
index a71a9cd7e..000000000
--- a/sys/fds.go
+++ /dev/null
@@ -1,35 +0,0 @@
-//go:build !windows && !darwin
-// +build !windows,!darwin
-
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package sys
-
-import (
-	"os"
-	"path/filepath"
-	"strconv"
-)
-
-// GetOpenFds returns the number of open fds for the process provided by pid
-func GetOpenFds(pid int) (int, error) {
-	dirs, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "fd"))
-	if err != nil {
-		return -1, err
-	}
-	return len(dirs), nil
-}