Revert "Merge branch 'en/header-split-cache-h-part-3' into next"

This reverts commit 76ebce0b7a,
reversing changes made to 62e19d66fb,
in preparation for redoing the topic to make it buildable from the
source.

replace-object.h

@@ -3,7 +3,7 @@
 
 #include "oidmap.h"
 #include "repository.h"
-#include "object-store-ll.h"
+#include "object-store.h"
 
 struct replace_object {
 	struct oidmap_entry original;