meta-phosphor: Disable systemd manpage generation

This saves the download and building of the following packages:

 libxslt
 xmlto
 docbook-xml-dtd4
 docbook-xsl-stylesheets

Change-Id: Ib2488375f642ce72e18c57ee6b77cdb71251d7c6
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/common/recipes-core/systemd/systemd_%.bbappend b/common/recipes-core/systemd/systemd_%.bbappend
index 3208ae3..a18d673 100644
--- a/common/recipes-core/systemd/systemd_%.bbappend
+++ b/common/recipes-core/systemd/systemd_%.bbappend
@@ -3,7 +3,8 @@
 PACKAGES =+ "${PN}-catalog-extralocales"
 PACKAGECONFIG_append = " networkd coredump"
 PACKAGECONFIG_remove = "machined hibernate ldconfig binfmt backlight localed \
-                        quotacheck kdbus ima smack polkit logind bootchart utmp"
+                        quotacheck kdbus ima smack polkit logind bootchart utmp \
+                        manpages"
 FILESEXTRAPATHS_append := "${THISDIR}/${PN}:"
 SRC_URI += "file://default.network"
 SRC_URI += "file://service-restart-policy.conf"