Remove unused using directives from DetectSample and ScriptImportDecider

Leftover imports from FFMpeg removal causing IDE0005 build errors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: claude

src/NzbDrone.Core/MediaFiles/GameImport/DetectSample.cs

@@ -1,4 +1,3 @@
-using System.IO;
 using NLog;
 using NzbDrone.Core.Games;
 

src/NzbDrone.Core/MediaFiles/ScriptImportDecider.cs

@@ -8,7 +8,6 @@
 using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Processes;
 using NzbDrone.Core.Configuration;
-using NzbDrone.Core.MediaFiles.MediaInfo;
 using NzbDrone.Core.Parser;
 using NzbDrone.Core.Parser.Model;
 using NzbDrone.Core.Tags;