diff --git a/libcontainer/system/userns_deprecated.go b/libcontainer/system/userns_deprecated.go
deleted file mode 100644
index 465c1a693..000000000
--- a/libcontainer/system/userns_deprecated.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package system
-
-import "github.com/opencontainers/runc/libcontainer/userns"
-
-// RunningInUserNS detects whether we are currently running in a user namespace.
-// Deprecated: use github.com/opencontainers/runc/libcontainer/userns.RunningInUserNS instead
-var RunningInUserNS = userns.RunningInUserNS