Description of problem:

Error is logged...
/usr/lib/systemd/system/plymouth-start.service:15: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group'. Support for KillMode=none is deprecated and will eventually be removed.: 1 Time(s)

Version-Release number of selected component (if applicable):

plymouth.x86_64                        0.9.4-16.20200325gite31c81f.fc33

How reproducible:

Every boot.

Steps to Reproduce:
1. Boot
2. See journal log or logwatch
3.

Actual results:

/usr/lib/systemd/system/plymouth-start.service:15: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group'. Support for KillMode=none is deprecated and will eventually be removed.: 1 Time(s)

Expected results:

No error.

Additional info:

This was noted in, https://bugzilla.redhat.com/show_bug.cgi?id=1807771
but still seemingly not fixed.