treewide: remove cache.h inclusion due to previous changes

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/range-diff.c b/range-diff.c
index a1e0cff..6a704e6 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -1,4 +1,4 @@
-#include "cache.h"
+#include "git-compat-util.h"
 #include "environment.h"
 #include "gettext.h"
 #include "range-diff.h"