xfce4-session: get rid of machine-host

OE-Core's base-file does add hostname to hosts since:

commit 31e6d08f20a804fccb958e19045d8f9e9806071a
Author: Chen Qi <Qi.Chen@windriver.com>
Date:   Tue Jan 8 17:12:52 2019 +0800

    netbase/base-files: move /etc/hosts from netbase to base-files

    Move /etc/hosts to base-files, and also add entry to it according
    to hostname setting. This fixes the problem of commands like
    `hostname -f' failing due to lack of such entry.

    Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
    Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-xfce/conf/layer.conf

@@ -20,7 +20,3 @@ LAYERDEPENDS_xfce-layer += "meta-python"
 LAYERDEPENDS_xfce-layer += "networking-layer"
 
 LAYERSERIES_COMPAT_xfce-layer = "thud warrior"
-
-SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS += " \
-  xfce4-session->machine-host \
-"

meta-xfce/recipes-xfce/xfce4-session/machine-host.bb

@@ -1,17 +0,0 @@
-SUMMARY = "Meta package adding machine name to known hosts"
-LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
-
-ALLOW_EMPTY_${PN} = "1"
-
-LOCALHOSTMACHINE = "127.0.0.1    ${MACHINE}"
-
-# on some machines starting applications as xfce4-terminal take ages without
-# machine name in hosts
-pkg_postinst_${PN} () {
-if ! grep -q '${LOCALHOSTMACHINE}' $D/etc/hosts ; then
-    echo '${LOCALHOSTMACHINE}' >> $D/etc/hosts
-fi
-}
-
-PACKAGE_ARCH = "${MACHINE_ARCH}"

meta-xfce/recipes-xfce/xfce4-session/xfce4-session_4.13.1.bb

@@ -30,5 +30,3 @@ FILES_${PN} += " \
 FILES_${PN} += " \
     ${libdir}/xfce4/session/splash-engines/*.la \
 "
-
-RDEPENDS_${PN} += "machine-host"