Merge branch 'ep/remove-duplicated-includes'

Code clean-up.

* ep/remove-duplicated-includes:
  attr.h: remove duplicate struct definition
  t/helper/test-run-command.c: delete duplicate include
  builtin/stash.c: delete duplicate include
  builtin/sparse-checkout.c: delete duplicate include
  builtin/gc.c: delete duplicate include
  attr.c: delete duplicate include

builtin/sparse-checkout.c

@@ -8,7 +8,6 @@
 #include "run-command.h"
 #include "strbuf.h"
 #include "string-list.h"
-#include "cache.h"
 #include "cache-tree.h"
 #include "lockfile.h"
 #include "resolve-undo.h"