Remove mdmonitor service from boot.iso

There's no reason for it to run, it can't notify anyone. But disabling
the service, or masking it, doesn't work so remove the service files
from the rootfs.

Resolves: rhbz#1888730

share/templates.d/99-generic/runtime-cleanup.tmpl

@@ -239,7 +239,7 @@ removefrom linux-firmware /usr/lib/firmware/mellanox/mlxsw_spectrum*
     removefrom linux-firmware /usr/lib/firmware/dpaa2/*
 %endif
 removefrom lldpad /etc/*
-removefrom mdadm /etc/*
+removefrom mdadm /etc/* /usr/lib/systemd/system/mdmonitor*
 removefrom mesa-dri-drivers /usr/${libdir}/dri/*_video.so
 removefrom mt-st /usr/sbin/*
 removefrom mtools /etc/*

share/templates.d/99-generic/runtime-postinstall.tmpl

@@ -37,8 +37,6 @@ symlink /lib/systemd/system/rngd.service etc/systemd/system/basic.target.wants/r
 ## Disable unwanted systemd services
 systemctl disable systemd-readahead-collect.service \
                   systemd-readahead-replay.service \
-                  mdmonitor.service \
-                  mdmonitor-takeover.service \
                   lvm2-monitor.service \
                   dnf-makecache.timer
 ## These services can't be disabled normally (they're linked into place in