Removes all cached memory of perform.call
     
    
    Usage
    clear.all.cached(directory = "/cache")
 
    
    Arguments
- directory
- Place inside user-level cache directory that was used
to store the cached data previously. Default: "/cache". 
 
    
    Value
    'Done' if data was successfully forgotten, error message if
cache directory was not found
     
    
    Examples
    if (FALSE) { # \dontrun{
clear.all.cached() 
} # }