Remove unused transport hints #260

Job	Run time
industrial_ci (rolling, main)	49s
industrial_ci (kilted, main)	3m 26s
industrial_ci (rolling, testing)	3m 53s
industrial_ci (humble, testing)	4m 15s
industrial_ci (jazzy, testing)	3m 10s
industrial_ci (jazzy, main)	3m 40s
industrial_ci (humble, main)	3m 40s
industrial_ci (kilted, testing)	3m 34s
	26m 27s

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