Solve unused header warnings reported by clangd

src/libfetchers/fetchers.hh

@@ -11,6 +11,8 @@
 #include <memory>
 #include <nlohmann/json_fwd.hpp>
 
+#include "ref.hh"
+
 namespace nix { class Store; class StorePath; struct SourceAccessor; }
 
 namespace nix::fetchers {

src/libfetchers/tarball.cc

@@ -2,12 +2,10 @@
 #include "fetchers.hh"
 #include "cache.hh"
 #include "filetransfer.hh"
-#include "globals.hh"
 #include "store-api.hh"
 #include "archive.hh"
 #include "tarfile.hh"
 #include "types.hh"
-#include "split.hh"
 #include "store-path-accessor.hh"
 #include "store-api.hh"
 #include "git-utils.hh"

src/libfetchers/tarball.hh

@@ -1,11 +1,12 @@
 #pragma once
 
-#include "types.hh"
-#include "path.hh"
-#include "hash.hh"
-
 #include <optional>
 
+#include "hash.hh"
+#include "path.hh"
+#include "ref.hh"
+#include "types.hh"
+
 namespace nix {
 class Store;
 struct SourceAccessor;