Remove python 3.8 build #168

Job	Run time
build	1m 5s
system-tests / Get parameters / Get parameters	14s
system-tests / Build end-to-end (alb)	1m 15s
system-tests / Build end-to-end (apigw-http)	1m 13s
system-tests / Build end-to-end (alb-multi)	1m 12s
system-tests / Build end-to-end (function-url)	1m 8s
system-tests / Build end-to-end (apigw-rest)	1m 8s
system-tests / parametric	0s
system-tests / End-to-end #1 / function-url 1	1m 59s
system-tests / End-to-end #1 / apigw-http 1	1m 44s
system-tests / End-to-end #1 / apigw-rest 1	1m 54s
system-tests / End-to-end #1 / alb 1	1m 29s
system-tests / End-to-end #1 / alb-multi 1	1m 42s
system-tests / Report failures	-1s
	16m 2s

Provide feedback