What can be removed from Android Tablet?
You can gain root access depending on your Android version using various methods on that device.  

Try these first,


FramaRoot Application
TowelRoot Application  

Then, only if they failed !
KingRoot 4.9.6 Application  



  Kingroot will root %99 of Android device's running below Android 5.0, however it is annoying to remove it, that's why i suggest FramaRoot first.