chess-pgn: Remove the extra check while setting TimeControl tag

TimeControl tag should be set irrespective of whether WhiteTimeLeft
or BlackTimeLeft tag has been set

Closes #45
1 job for issue_45 in 5 minutes and 53 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #789036
flatpak
flatpak

00:05:53