How do you delete redundacy events on a 9200

On a 9200 when i do a 'show health'

it reports a lot of historic redundacy events, is there a command to delete/tidy these up?

i can find a 'clear' command for alarms, but not for redundancy events

xxxxxxxxx> sh hea

  Slot            Type            Health Score    Role
  0               SPU0            100             ACTIVE
  1               SPU1            100             STANDBY
  2               NPU0            100             ACTIVE
  3               NPU1            100             STANDBY
  4               TCU0            100             ACTIVE
  5               TCU1            100             STANDBY
  6               TCU2            Not Installed
  7               MIU0            100             ACTIVE
  8               MIU1            100             STANDBY
  9               PHY0            100             ACTIVE
  10              PHY1            100             STANDBY
  11              PHY2            100             STANDBY
  12              PHY3            100             ACTIVE
  13              REAR FAN        100             ACTIVE
  14              FRONT FAN       100             ACTIVE
  15              POWER0          100             ACTIVE
  16              POWER1          100             ACTIVE
  17              POWER2          Not Installed
  18              POWER3          Not Installed

                              Redundancy Event List
Event  Card   Time                      Description                      Reason

1      PHY0   2013-07-26 14:39:00       Switched Role to Standby         Health