bugfix(UTAPI-109): Remove unused imports #669

Job	Run time
lint	1m 28s
build-ci / vault-ci	47s
build-ci / redis-ci / build	20s
build-ci / warp10-ci / build	1m 48s
build-ci / redis-replica-ci / build	29s
tests-v2-with-vault	3m 5s
run v2 soft limit test	2m 33s
run unit tests	1m 8s
run v2 hard limit test	2m 33s
run v1 client tests	1m 7s
run v1 server tests	1m 15s
run v1 cron tests	1m 16s
run v1 interval tests	2m 1s
	19m 50s

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