diff --git a/src/branch_tier.hpp b/src/branch_tier.hpp
index 0d586c3d..bbf680bd 100644
--- a/src/branch_tier.hpp
+++ b/src/branch_tier.hpp
@@ -12,9 +12,6 @@ public:
   BranchTier();
   BranchTier(toml::value const &);
 
-public:
-  void copy_enabled_rw(BranchTier &) const;
-
 public:
   uint64_t min_free_space;