On macOS any MDM enrollment is not hidden. You are prompted as part of device enrollment and even if you accept, the system preferences show the profile control visually always and clearly. If you have no profile entry in system preferences (check that it's not enabled and hidden by selecting Customize from the view menu - if you don't see it - you're not managed)

Enumeration of /S/L/LaunchAgents and LaunchDaemons can be done, but I wouldn’t waste any time once you wiped the drive and reinstalled the os.
On my Mac - there are 304 system launch agents and 339 system launch daemons - including the ones you mentioned. Those frameworks exist on all macOS installs to work with MDM and not to indicate your Mac is currently managed. Just that it could later become managed if you enroll it or approve device enrollment if Apple points your Mac to an MDM endpoint.
mac:~ me$ ls -la /System/Library/LaunchAgents | wc -l
304
mac:~ me$ ls -la /System/Library/LaunchDaemons | wc -l
339
mac:~ me$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.14.5
BuildVersion: 18F132
mac:~ me$ ls -la /System/Library/Launch* | egrep -i "mdm|managed"
-rw-r--r-- 1 root wheel 1525 Aug 20 2018 com.apple.ManagedClientAgent.agent.plist
-rw-r--r-- 1 root wheel 549 Aug 20 2018 com.apple.ManagedClientAgent.enrollagent.plist
-rw-r--r-- 1 root wheel 1458 Aug 20 2018 com.apple.mdmclient.agent.plist
-rw-r--r-- 1 root wheel 719 Aug 20 2018 com.apple.ManagedClient.cloudconfigurationd.plist
-rw-r--r-- 1 root wheel 516 Aug 20 2018 com.apple.ManagedClient.enroll.plist
-rw-r--r-- 1 root wheel 523 Aug 20 2018 com.apple.ManagedClient.plist
-rw-r--r-- 1 root wheel 645 Aug 20 2018 com.apple.ManagedClient.startup.plist
-rw-r--r-- 1 root wheel 792 Aug 20 2018 com.apple.mdmclient.daemon.plist
-rw-r--r-- 1 root wheel 578 Aug 20 2018 com.apple.mdmclient.daemon.runatboot.plist