Delete all of the "example" template code

[danielbrownmsm]

Ticket Template Summary When you make a new project, WPILib starts you off with some example code that you never end up using, to create a template for you. We aren't going to use it, so delete it. This is a good issue to practice our software development process with. Also, we don't need the constants file, as we shall be using TOML to store all of our robot constants.

Work Required

• remove "ExampleSubsystem.h"
• remove "ExampleSubsystem.cpp"
• remove "ExampleCommand.h"
• remove "ExampleCommand.cpp"
• remove "Constants.h"
• fix RobotContainer so the code builds

Verification

• all example files removed
• CI passes

[deadlyvortex]

examplecommand cpp done examplecommand.h examplesubsystem cpp example subsytem.h constants.h robot container all done