removed dead code. #6300

Job	Run time
setup-environment	3m 18s
lint	25m 46s
tidy	2m 31s
gofmt	5m 59s
generate-metrics	7m 11s
coverage	11m 27s
cross-compile (binaries-darwin_amd64)	8m 8s
test	23m 21s
cross-compile (binaries-darwin_arm64)	6m 44s
cross-compile (binaries-linux_amd64)	6m 38s
cross-compile (binaries-linux_arm64)	9m 24s
cross-compile (binaries-windows_amd64)	6m 51s
cross-compile (binaries-linux_ppc64le)	6m 43s
	2h 4m 1s

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