package/samba4: drop third patch

Drop third patch as it is not needed when using compile_et from heimdal
instead of compile_et from e2fprogs as spotted by upstream in:
https://bugzilla.samba.org/show_bug.cgi?id=13856#c20

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/samba4/0003-Fix-unistd.h-include.patch

@@ -1,38 +0,0 @@
-From 85c33f89df8607ace0707e1360ff0f79f3e8f5f3 Mon Sep 17 00:00:00 2001
-From: Andy Walsh <andy.walsh44+github@gmail.com>
-Date: Wed, 6 Nov 2019 19:28:30 +0100
-Subject: [PATCH] Fix unistd.h include
-
-Fixes build error
-
-source4/heimdal/lib/asn1/asn1_err.c:47:23: error: 'link' redeclared as different kind of symbol
- static struct et_list link = { 0, 0 };
-
-Downloaded from
-https://github.com/Andy2244/openwrt-extra/blob/samba-4.10/samba4/patches/006-samba-4-10-musl_rm_unistd_incl.patch
-
-Upstream bug report: https://bugzilla.samba.org/show_bug.cgi?id=13856
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
----
- lib/replace/replace.h | 4 ----
- 1 file changed, 4 deletions(-)
-
-diff --git a/lib/replace/replace.h b/lib/replace/replace.h
-index 1658465866e..e6768c4ae51 100644
---- a/lib/replace/replace.h
-+++ b/lib/replace/replace.h
-@@ -168,10 +168,6 @@
- #include <bsd/unistd.h>
- #endif
- 
--#ifdef HAVE_UNISTD_H
--#include <unistd.h>
--#endif
--
- #ifdef HAVE_STRING_H
- #include <string.h>
- #endif
--- 
-2.20.1
-