how can i 'undo' my own warp changes to a track?

[maximum01]

i'm still making the transition to 8 after years of using 6 and basically botched the warping of a few tracks.

so my problem is i'd like to reset my manipulation of the warp markers on these tracks and start over. trouble is in live 8 if i delete warp markets the waveform for the track stays put.

how do i get the track back to default?

[maximum01]

just to be clear...this question pertains to a track that's been saved after manipulation