treewide: remove cache.h inclusion due to object-file.h changes

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/notes-merge.c b/notes-merge.c
index cc9538a..233e49e 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "git-compat-util.h"
 #include "advice.h"
 #include "commit.h"
 #include "gettext.h"