Remove host and target configuration from config.txt #1059

Job	Run time
abi_cafe (macos-latest, aarch64-apple-darwin)	2m 48s
abi_cafe (macos-latest, x86_64-apple-darwin)	4m 1s
abi_cafe (ubuntu-latest, x86_64-unknown-linux-gnu)	3m 11s
abi_cafe (windows-latest, x86_64-pc-windows-msvc)	3m 47s
	13m 47s

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