chore: [0.15] remove obsolete parts #2919

Job	Run time
deploy_downloader	10s
deploy_precompiled_downloader (download-windows-x64.exe, x86_64-pc-windows-msvc, windows-2019)	4m 35s
deploy_precompiled_downloader (download-linux-x64, x86_64-unknown-linux-gnu, ubuntu-20.04)	2m 41s
build_and_deploy (windows-2019, x86_64-pc-windows-msvc, windows-x64-cpu, cpu, false)	6m 43s
deploy_precompiled_downloader (download-linux-arm64, aarch64-unknown-linux-gnu, ubuntu-20.04)	3m 11s
build_and_deploy (windows-2019, directml, x86_64-pc-windows-msvc, windows-x64-directml, directml,...	9m 27s
deploy_precompiled_downloader (download-osx-x64, x86_64-apple-darwin, macos-12)	1s
build_and_deploy (windows-2019, x86_64-pc-windows-msvc, windows-x64-cuda, cuda, true)	1s
deploy_precompiled_downloader (download-osx-arm64, aarch64-apple-darwin, macos-12)	1s
build_and_deploy (windows-2019, i686-pc-windows-msvc, windows-x86-cpu, cpu, false)	9m 42s
build_and_deploy (ubuntu-20.04, x86_64-unknown-linux-gnu, linux-x64-cpu, cpu, false)	3m 34s
build_and_deploy (ubuntu-20.04, x86_64-unknown-linux-gnu, linux-x64-gpu, cuda, true)	4m 4s
build_and_deploy (ubuntu-20.04, aarch64-unknown-linux-gnu, linux-arm64-cpu, cpu, false)	4m 3s
build_and_deploy (macos-12, aarch64-apple-darwin, osx-arm64-cpu, cpu, false)	1s
build_and_deploy (macos-12, x86_64-apple-darwin, osx-x64-cpu, cpu, false)	1s
	48m 15s

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