dbus-test: Remove EXTRA_OECONF_X configs

X specific configs are already handled through PACKAGECONFIG:
PACKAGECONFIG ??= "${@bb.utils.filter('DISTRO_FEATURES', 'systemd x11', d)}"
...
PACKAGECONFIG[x11] = "--with-x --enable-x11-autolaunch,--without-x
                      --disable-x11-autolaunch, virtual/libx11 libsm"

Remove duplicated EXTRA_OECONF_X args.

(From OE-Core rev: 7dc107b05a29f8a3e8903d73f84ef8069f68af6f)

(From OE-Core rev: d747c666ed563488af0b894d4e3236335aa2a8bf)

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 036e3436e5)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/dbus/dbus-test_1.12.18.bb

@@ -24,9 +24,6 @@ FILESEXTRAPATHS =. "${FILE_DIRNAME}/dbus:"
 
 inherit autotools pkgconfig gettext ptest upstream-version-is-even
 
-EXTRA_OECONF_X = "${@bb.utils.contains('DISTRO_FEATURES', 'x11', '--with-x', '--without-x', d)}"
-EXTRA_OECONF_X_class-native = "--without-x"
-
 EXTRA_OECONF = "--enable-tests \
                 --enable-modular-tests \
                 --enable-installed-tests \
@@ -37,7 +34,6 @@ EXTRA_OECONF = "--enable-tests \
                 --disable-doxygen-docs \
                 --disable-libaudit \
                 --with-dbus-test-dir=${PTEST_PATH} \
-                ${EXTRA_OECONF_X} \
                 --enable-embedded-tests \
              "