it wouldn't normally be removed - you presumably signed a wayleave document giving VM permission to install it a number of years ago and once in it's essentially classed as a utility - you, or a future owner of the house may choose to re-contract services one day..
that said, if the cabling poses any sort of risk (e.g. trip hazard etc.) or is susceptible to being damaged (which could impact other VM customers in the area) then VM are likely to want to do something about it - you may want to post some pictures of it here so that when forum staff get to the post they can assess what needs to be done.. If there's a good reason to do something about it the forum staff here can arrange for the local engineering team to come out and do something about it..