attr.c: delete duplicate include

dir.h is included more than once

Signed-off-by: Elia Pinto <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: devzero2000

attr.c

@@ -14,7 +14,6 @@
 #include "utf8.h"
 #include "quote.h"
 #include "thread-utils.h"
-#include "dir.h"
 
 const char git_attr__true[] = "(builtin)true";
 const char git_attr__false[] = "\0(builtin)false";