Remove or comment `recent_measurement_attempt` KeyValue in the bandwidth-file-spec.txt
In tpo/network-health/sbws!34 we have removed the KeyValue, to avoid sbws crashing cause it can't handle that big amount of json data (tpo/network-health/sbws#40020) and maybe making sbws (tpo/network-health/sbws#40020).
We should remove that KeyValue in the specification (new version?) or comment it's removed from sbws version 1.1.0+161.g8fdd85b7
issue