package/x11r7/xlib_libXfont: remove autoreconf

package/x11r7/xlib_libXfont: remove autoreconf

Nine years ago we added autoreconf to fix libtool-related problems
with the matchbox package:

https://git.buildroot.net/buildroot/commit/?id=51ef5b81224c243aa7f937c4690b1a120c81ccbc

Autoreconf for this package needs the xutil_util-macros but after
building this defconfig with autoreconf removed from this package

BR2_x86_64=y
BR2_x86_core_avx2=y
BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_PACKAGE_XORG7=y
BR2_PACKAGE_XLIB_LIBXFONT=y
BR2_PACKAGE_MATCHBOX=y
BR2_PACKAGE_MATCHBOX_SM=y
BR2_PACKAGE_MATCHBOX_COMMON=y
BR2_PACKAGE_MATCHBOX_COMMON_PDA=y
BR2_PACKAGE_MATCHBOX_DESKTOP=y
BR2_PACKAGE_MATCHBOX_KEYBOARD=y
BR2_PACKAGE_MATCHBOX_PANEL=y
BR2_PACKAGE_MATCHBOX_STARTUP_MONITOR=y

it is obvious that the problem which existed nine years ago seems to be
gone. So instead of fixing autoreconf we remove it from this package
because there is no need for it anymore.

Fixes
http://autobuild.buildroot.net/results/30c/30cf5cc139f9f6a9dc070953270f74e18b9310d4/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>