[hal] Remove FPGA functions that won't exist on SC (#8273)

wpilibj/src/main/java/edu/wpi/first/wpilibj/RobotController.java

@@ -28,26 +28,6 @@ public final class RobotController {
     throw new UnsupportedOperationException("This is a utility class!");
   }
 
-  /**
-   * Return the FPGA Version number. For now, expect this to be the current year.
-   *
-   * @return FPGA Version number.
-   */
-  public static int getFPGAVersion() {
-    return HALUtil.getFPGAVersion();
-  }
-
-  /**
-   * Return the FPGA Revision number. The format of the revision is 3 numbers. The 12 most
-   * significant bits are the Major Revision. the next 8 bits are the Minor Revision. The 12 least
-   * significant bits are the Build Number.
-   *
-   * @return FPGA Revision number.
-   */
-  public static long getFPGARevision() {
-    return HALUtil.getFPGARevision();
-  }
-
   /**
    * Return the serial number of the roboRIO.
    *