libpng: drop unnecessary automake requirement lowering patch

Automake recipe provides automake 1.14.1 anyway

(From OE-Core rev: 3e8ce8508356112e07e37734d228494a840cf04c)

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/libpng/libpng/0001-configure-lower-automake-requirement.patch

@@ -1,31 +0,0 @@
-From fff7cbc01e061a235852f385866fe75fb17867e3 Mon Sep 17 00:00:00 2001
-From: Valentin Popa <valentin.popa@intel.com>
-Date: Tue, 26 Nov 2013 12:06:55 +0200
-Subject: [PATCH] configure: lower automake requirement
-
-We're not using parallel tests in OE-core yet
-
-Signed-off-by: Valentin Popa <valentin.popa@intel.com>
-Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
-
-Upstream-Status: Inapropriate [OE specific build hack]
----
- configure.ac | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/configure.ac b/configure.ac
-index 28200c3..fab2515 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -27,7 +27,7 @@ AC_CONFIG_MACRO_DIR([scripts])
- # dist-xz requires automake 1.11 or later
- # 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
- # 1.13 is required for parallel tests
--AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules subdir-objects])
-+AM_INIT_AUTOMAKE([1.12.2 foreign dist-xz color-tests silent-rules subdir-objects])
- # The following line causes --disable-maintainer-mode to be the default to
- # configure, this is necessary because libpng distributions cannot rely on the
- # time stamps of the autotools generated files being correct
--- 
-1.8.3.2
-

meta/recipes-multimedia/libpng/libpng_1.6.10.bb

@@ -9,7 +9,6 @@ DEPENDS = "zlib"
 LIBV = "16"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/project/libpng/libpng${LIBV}/${PV}/libpng-${PV}.tar.xz \
-           file://0001-configure-lower-automake-requirement.patch \
           "
 
 SRC_URI[md5sum] = "5f414b20f683b1d96b163c89e3eff768"