Name
input_ff_erase — 
     erase a force-feedback effect from device
 
Arguments
- dev
- 
     input device to erase effect from
     
- effect_id
- 
     id of the effect to be erased
     
- file
- 
     purported owner of the request
     
Description
   This function erases a force-feedback effect from specified device.
   The effect will only be erased if it was uploaded through the same
   file handle that is requesting erase.