How to stop SilentCleanServer app from running
This Apple Community discussion thread may have the answer: 


  Try deleting the "com.imobie.PhoneClean" and "com.iMobie.SilentCleanServer" folders in ~/Library/Application Support.


or


  Theres an underlying silentcleanserver app, which is located once you "show all contents". I uninstalled and its gone!