Delete documentation about maintaining a track
Delete documentation about maintaining a track

This has been moved and elaborated upon in
https://github.com/exercism/docs/tree/master/maintaining-a-track

exercism/x-common,petertseng/x-common,kgengler/x-common,ErikSchierboom/x-common,jmluy/x-common,Vankog/problem-specifications,petertseng/x-common,kgengler/x-common,jmluy/x-common,Vankog/problem-specifications,ErikSchierboom/x-common,jmluy/x-common,exercism/x-common,rpottsoh/x-common,rpottsoh/x-common