[examples] Prepare for RobotInit deprecation by updating examples (#6623)

Co-authored-by: Tyler Veness <calcmogul@gmail.com>

wpilibc/src/main/native/include/frc/IterativeRobotBase.h

@@ -63,10 +63,8 @@ class IterativeRobotBase : public RobotBase {
    * which will be called when the robot is first powered on. It will be called
    * exactly one time.
    *
-   * Warning: the Driver Station "Robot Code" light and FMS "Robot Ready"
-   * indicators will be off until RobotInit() exits. Code in RobotInit() that
-   * waits for enable will cause the robot to never indicate that the code is
-   * ready, causing the robot to be bypassed in a match.
+   * Note: This method is functionally identical to the class constructor so
+   * that should be used instead.
    */
   virtual void RobotInit();
 

wpilibc/src/test/native/cpp/TimedRobotTest.cpp

@@ -48,9 +48,7 @@ class MockRobot : public TimedRobot {
   std::atomic<uint32_t> m_teleopPeriodicCount{0};
   std::atomic<uint32_t> m_testPeriodicCount{0};
 
-  MockRobot() : TimedRobot{kPeriod} {}
-
-  void RobotInit() override { m_robotInitCount++; }
+  MockRobot() : TimedRobot{kPeriod} { m_robotInitCount++; }
 
   void SimulationInit() override { m_simulationInitCount++; }