remove outdated instructions (#1824) #1125

Job	Run time
get-product-version	7s
Determine Go toolchain version	7s
Go 1.21.3 freebsd 386 build	49s
generate-metadata-file	30s
Go 1.21.3 darwin amd64 build	1m 30s
Go 1.21.3 freebsd amd64 build	40s
Go 1.21.3 linux arm build	1m 28s
Go 1.21.3 freebsd arm build	42s
Go 1.21.3 darwin arm64 build	48s
Go 1.21.3 linux arm64 build	1m 43s
Go 1.21.3 linux 386 build	1m 41s
Go 1.21.3 windows 386 build	43s
Go 1.21.3 linux amd64 build	1m 43s
Go 1.21.3 windows amd64 build	38s
Go 1.21.3 netbsd 386 build	35s
Go 1.21.3 netbsd amd64 build	37s
Go 1.21.3 netbsd arm build	46s
Go 1.21.3 openbsd 386 build	34s
Go 1.21.3 openbsd amd64 build	42s
Go 1.21.3 openbsd arm build	41s
Go 1.21.3 solaris amd64 build	50s
Docker arm default release build	34s
Docker arm64 default release build	23s
Docker 386 default release build	26s
Docker amd64 default release build	26s
	19m 43s

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