bind: drop lost patch

Commit "c37207d0aca5 bind: update to ESV version 9.11.3" dropped
0001-build-use-pkg-config-to-find-libxml2.patch
from recipe, but left the patch itself in source tree.
Remove this patch since nobody uses it.

Cc: Armin Kuster <akuster808@gmail.com>
(From OE-Core rev: 6d624b57397fce4ac98b98e8f47cd95336e44122)

Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/bind/bind/0001-build-use-pkg-config-to-find-libxml2.patch

@@ -1,54 +0,0 @@
-xml2-config is disabled, so change the configure script to use pkgconfig to find
-libxml2.
-
-Upstream-Status: Inappropriate
-Signed-off-by: Ross Burton <ross.burton@intel.com>
-
-Update context for version 9.10.3-P2.
-
-Signed-off-by: Kai Kang <kai.kang@windriver.com>
-
-Update context for version 9.10.5-P3.
-
-Signed-off-by: Kai Kang <kai.kang@windriver.com>
----
- configure.in | 23 +++--------------------
- 1 file changed, 3 insertions(+), 20 deletions(-)
-
-diff --git a/configure.in b/configure.in
-index 4da73a4..6f2a754 100644
---- a/configure.in
-+++ b/configure.in
-@@ -2282,26 +2282,9 @@ case "$use_libxml2" in
- 		DST_LIBXML2_INC=""
- 		;;
- 	auto|yes)
--		case X`(xml2-config --version) 2>/dev/null` in
--		X2.[[6789]].*)
--			libxml2_libs=`xml2-config --libs`
--			libxml2_cflags=`xml2-config --cflags`
--			;;
--		*)
--			if test "yes" = "$use_libxml2" ; then
--				AC_MSG_RESULT(no)
--				AC_MSG_ERROR(required libxml2 version not available)
--			else
--				libxml2_libs=
--				libxml2_cflags=
--			fi
--			;;
--		esac
--		;;
--	*)
--		if test -f "$use_libxml2/bin/xml2-config" ; then
--			libxml2_libs=`$use_libxml2/bin/xml2-config --libs`
--			libxml2_cflags=`$use_libxml2/bin/xml2-config --cflags`
-+		if pkg-config --exists libxml-2.0 ; then
-+			libxml2_libs=`pkg-config libxml-2.0 --libs`
-+			libxml2_cflags=`pkg-config libxml-2.0 --cflags`
- 		fi
- 		;;
- esac
--- 
-2.1.4
-