blktool: remove a duplicate patch

blktool-gnulib-makedev.patch is actually doing the same
thing as 0004-fix-ftbfs-glibc-2.28.patch, so we end up
including the same file twice.

(From OE-Core rev: 8de82c63fe49917c80d1b634819ae2001625a645)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/blktool/blktool/blktool-gnulib-makedev.patch

@@ -1,23 +0,0 @@
-include <sys/sysmacros.h> for major/minor defintions
-
-Fixes
-
-| ../blktool-4.orig/blktool.c: In function 'detect_dev_class':
-| ../blktool-4.orig/blktool.c:295:10: warning: implicit declaration of function 'major' [-Wimplicit-function-declaration]
-|   switch (major(st_rdev)) {
-|           ^~~~~
-
-Upstream-Status: Pending
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Index: blktool-4.orig/blktool.c
-===================================================================
---- blktool-4.orig.orig/blktool.c
-+++ blktool-4.orig/blktool.c
-@@ -27,6 +27,7 @@
- #include <linux/cdrom.h>
- #include <linux/major.h>
- #include <scsi/scsi.h>
-+#include <sys/sysmacros.h>
- 
- #include "blktool.h"
- 

meta/recipes-extended/blktool/blktool_4-7.1.bb

@@ -14,7 +14,6 @@ SRC_URI = "http://snapshot.debian.org/archive/debian/20160728T043443Z/pool/main/
            file://0002-fix-string-error.patch \
            file://0003-Fix-3-d-argument-for-BLKROSET-it-must-be-const-int.patch \
            file://0004-fix-ftbfs-glibc-2.28.patch \
-           file://blktool-gnulib-makedev.patch \
           "
 
 SRC_URI[tarball.md5sum] = "62edc09c9908107e69391c87f4f3fd40"