When I compile my code, I see:
Multiple libraries were found for "Adafruit_MCP23017.h"
Not used: C:\Program Files (x86)\Arduino\libraries\Adafruit-MCP23017
When I go to C:\Program Files (x86)\Arduino\libraries I do not see anything from Adafruit. I did accidently put it there in the past but have removed it.
I'm running version 1.8.3.
The program works fine but do not like anything less than a clean compile.