how to delete appoved leave requests from MSS UWL

hi all ,

how to delete the leave requests which the manager has already approved ....it is showing all the leave history as it shud get delete after approving the leaves of all emplyees from the UWL.....how to delete it ...i refresh the page also 5 times ...wen i open the leave request it is going to dump kindly find the screen shot

Regards,

JWALA,

ESS MSS.