diff --git a/libcontainer/cgroups/getallpids.go b/libcontainer/cgroups/getallpids.go
index 09c01fb6f..1355a5101 100644
--- a/libcontainer/cgroups/getallpids.go
+++ b/libcontainer/cgroups/getallpids.go
@@ -1,6 +1,3 @@
-//go:build go1.16
-// +build go1.16
-
 package cgroups
 
 import (
diff --git a/libcontainer/cgroups/getallpids_go115.go b/libcontainer/cgroups/getallpids_go115.go
deleted file mode 100644
index 6b645ef64..000000000
--- a/libcontainer/cgroups/getallpids_go115.go
+++ /dev/null
@@ -1,31 +0,0 @@
-//go:build !go1.16
-// +build !go1.16
-
-package cgroups
-
-import (
-	"os"
-	"path/filepath"
-)
-
-// GetAllPids returns all pids, that were added to cgroup at path and to all its
-// subcgroups.
-func GetAllPids(path string) ([]int, error) {
-	var pids []int
-	// collect pids from all sub-cgroups
-	err := filepath.Walk(path, func(p string, info os.FileInfo, iErr error) error {
-		if iErr != nil {
-			return iErr
-		}
-		if !info.IsDir() {
-			return nil
-		}
-		cPids, err := readProcsFile(p)
-		if err != nil {
-			return err
-		}
-		pids = append(pids, cPids...)
-		return nil
-	})
-	return pids, err
-}