add better support for IWYU and fix things

Remove the "make iwyu" build target. Move the functionality into the
recently introduced lint.fish script. Fix a lot, but not all, of the
include-what-you-use errors. Specifically, it fixes all of the IWYU errors
on my OS X server but only removes some of them on my Ubuntu 14.04 server.

Fixes #2957

1 files changed, 0 insertions, 4 deletions

diff --git a/src/util.h b/src/util.h
index 1afde073..d073ef83 100644
--- a/src/util.h
+++ b/src/util.h
@@ -5,10 +5,6 @@
 #ifndef FISH_UTIL_H
 #define FISH_UTIL_H
 
-#include <wchar.h>
-#include <stdarg.h>
-#include <unistd.h>
-
 /**
    Returns the larger of two ints
 */