Consider removing detect-binaries.sh script

[ellahathaway]

See dotnet/dotnet#553 (comment)

We should consider removing the stand-alone detect-binaries.sh script now that its detection functionality has been integrated into the build process. This change would simplify the workflow, improve speed, and enhance cross-platform support. The original script was created to help distro maintainers detect and remove binaries, but if that support is no longer needed via script functionality, we should remove the script and integrate the cleaning of binaries into the source-build build process as well.

[MichaelSimons]

[Triage] We should preserve the logic to remove binaries with the prep script which depends on detect-binaries.sh.