Air bleed on vertical ch hw pipes

Hi guys

I'm moving the main feed and return hw pipes from the boiler as the original route meant the pipes where wall mounted in the kitchen which looks naff. I've found a better route so they will be hidden. Anyway, at the top of the run I've found someone has fitted a couple of radiator bleed valves I presume to drain the air at the top of the pipe run. I've never seen anything like this before (well I don't do a lot of this kind of work to be fair) and it seems a bit pointless imo what with them being under the floor boards and carpet, the only person who would have known they where there would have been the original installer.
Is it worth moving them to the top of my new pipe run or shall I just ignore them? If I move them they will be back under the baords once I nail 'em down.

 

Hi mate, yup boiler downstairs, hw tank and manifold upstairs. Regular air bleed vents as seen in radiators, deffo not any kind of air vent valve.

 

Cheers mate