repository: remove unnecessary include of path.h

This also made it clear that several .c files that depended upon path.h
were missing a #include for it; add the missing includes while at it.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/archive.c b/archive.c
index 2ea9cbe..2ad5f44 100644
--- a/archive.c
+++ b/archive.c
@@ -6,6 +6,7 @@
 #include "environment.h"
 #include "gettext.h"
 #include "hex.h"
+#include "path.h"
 #include "pretty.h"
 #include "setup.h"
 #include "refs.h"