Remove duplicate type="button" #21178

Job	Run time
Determine Matrix	4s
Single Site Default / Test before	14m 8s
Single Site Default / Test current	13m 10s
Multisite Default / Test before	13m 19s
Multisite Default / Test current	13m 26s
Single Site Memcached / Test before	13m 44s
Single Site Memcached / Test current	13m 32s
Multisite Memcached / Test before	15m 0s
Multisite Memcached / Test current	13m 13s
Slack Notifications	0s
Compare / Single Site Default	9s
Compare / Single Site Memcached	16s
Compare / Multisite Default	10s
Compare / Multisite Memcached	11s
Failed workflow tasks	0s
	1h 50m 22s

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