win-dshow: Remove obsolete translation

A commit f50aa5e01b added a translation ConfigureAudio but never used.

plugins/win-dshow/data/locale/en-US.ini

@@ -11,7 +11,6 @@ ColorRange="Color Range"
 ColorRange.Default="Default"
 ColorRange.Partial="Limited"
 ColorRange.Full="Full"
-ConfigureAudio="Configure Audio"
 ConfigureVideo="Configure Video"
 ConfigureCrossbar="Configure Crossbar"
 ResFPSType="Resolution/FPS Type"