Remove the unnecessary link

Author: Winniexu01

Documentation/planning/arcade-powered-source-build/README.md

@@ -118,8 +118,6 @@ points, initially. Before onboarding any extra repos, it should be integrated
 into the Arcade SDK proper to reuse the code.
 
 * [in-arcade.md]
-* [Source code location in Arcade SDK
-  (`Microsoft.DotNet.Arcade.Sdk/tools/TrackPrebuiltUsage.targets`)](https://github.com/dotnet/arcade/blob/main/src/Microsoft.DotNet.Arcade.Sdk/tools/TrackPrebuiltUsage.targets)
 * [Source-build-specific MSBuild tool source in Arcade SDK
   (`Microsoft.DotNet.SourceBuild`)](https://github.com/dotnet/arcade/tree/main/src/Microsoft.DotNet.SourceBuild)