[wpimath] Constrain Rotation2d range to -pi to pi (#4611)

Co-authored-by: Ryan Blue <ryanzblue@gmail.com>

wpilibc/src/main/native/include/frc/interfaces/Gyro.h

@@ -66,10 +66,6 @@ class Gyro {
   /**
    * Return the heading of the robot as a Rotation2d.
    *
-   * The angle is continuous, that is it will continue from 360 to 361 degrees.
-   * This allows algorithms that wouldn't want to see a discontinuity in the
-   * gyro output as it sweeps past from 360 to 0 on the second time around.
-   *
    * The angle is expected to increase as the gyro turns counterclockwise when
    * looked at from the top. It needs to follow the NWU axis convention.
    *