Drop obsolete patch

patches/openwrt/to-upstream/0015-iproute2-Do-not-use-libelf.patch

-From 9b0a994d9804beea118753fb3c76542584fdcd17 Mon Sep 17 00:00:00 2001
-From: Michal Hrusecky <michal.hrusecky@nic.cz>
-Date: Fri, 14 Dec 2018 15:14:10 +0100
-Subject: [PATCH] iproute2: Do not use libelf
-
-Patch out libelf check in configure script as if libelf is by coincidence build
-before iproute2, it gets selected which breaks dependencies and build.
-
-Signed-off-by: Michal Hrusecky <michal.hrusecky@nic.cz>
----
- .../utils/iproute2/patches/910-no-libelf.pach       | 13 +++++++++++++
- 1 file changed, 13 insertions(+)
- create mode 100644 package/network/utils/iproute2/patches/910-no-libelf.pach
-
-diff --git a/package/network/utils/iproute2/patches/910-no-libelf.pach b/package/network/utils/iproute2/patches/910-no-libelf.pach
-new file mode 100644
-index 0000000000..e2202790fe
---- /dev/null
-+++ b/package/network/utils/iproute2/patches/910-no-libelf.pach
-@@ -0,0 +1,13 @@
-+Index: iproute2-4.19.0/configure
-+===================================================================
-+--- iproute2-4.19.0.orig/configure
-++++ iproute2-4.19.0/configure
-+@@ -252,7 +252,7 @@ EOF
-+ 
-+ check_elf()
-+ {
-+-    if ${PKG_CONFIG} libelf --exists
-++    if false
-+     then
-+ 	echo "HAVE_ELF:=y" >>$CONFIG
-+ 	echo "yes"
--- 
-2.19.2
-