diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index a117dfcbf7..8db7f07ba2 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -241,19 +241,6 @@ int cg_read_event(
         }
 }
 
-bool cg_ns_supported(void) {
-        static thread_local int supported = -1;
-
-        if (supported >= 0)
-                return supported;
-
-        if (access("/proc/self/ns/cgroup", F_OK) >= 0)
-                return (supported = true);
-        if (errno != ENOENT)
-                log_debug_errno(errno, "Failed to check whether /proc/self/ns/cgroup is available, assuming not: %m");
-        return (supported = false);
-}
-
 bool cg_kill_supported(void) {
         static thread_local int supported = -1;
 
diff --git a/src/basic/cgroup-util.h b/src/basic/cgroup-util.h
index 0fb6b7677d..949de7f9e2 100644
--- a/src/basic/cgroup-util.h
+++ b/src/basic/cgroup-util.h
@@ -311,7 +311,6 @@ int cg_mask_supported_subtree(const char *root, CGroupMask *ret);
 int cg_mask_from_string(const char *s, CGroupMask *ret);
 int cg_mask_to_string(CGroupMask mask, char **ret);
 
-bool cg_ns_supported(void);
 bool cg_kill_supported(void);
 
 int cg_all_unified(void);