Initial refactor of namespace handling

src/util/util.cc

@@ -68,6 +68,7 @@ std::string join(const std::vector<std::string> &toks, std::string delimiter)
     return fmt::format("{}", fmt::join(toks, delimiter));
 }
 
+/*
 std::string ns_relative(
     const std::vector<std::string> &namespaces, const std::string &n)
 {
@@ -93,6 +94,7 @@ std::string ns_relative(
     }
     return res;
 }
+*/
 
 std::string unqualify(const std::string &s)
 {