How to disable the charge indicator on the GS7 lock screen
The culprit is a feature of the GO Launcher.  It has the appearance if being a default function of the phone's OS.  The screen has one option in the menu:  turn off fast charging.  That will disable that screen, but it won't disable the Samsung GS(x)'s fast charging.  You can enable or disable the GS7's fast charging in the Settings menu of the device (not the Go program)

Turning that switch on the screen disabled the extra step (having to slide) before you get to your actual unlock screen where you put in your code.

This screen will manifest itself on any Android phone or tablet running the Go Launcher menu app.