actions: Extract revoke_preregistration_users function.
actions: Extract revoke_preregistration_users function.

andersk/zulip,punchagan/zulip,zulip/zulip,rht/zulip,rht/zulip,hackerkid/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,zulip/zulip,punchagan/zulip,zulip/zulip,punchagan/zulip,kou/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,punchagan/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,hackerkid/zulip,hackerkid/zulip,zulip/zulip,punchagan/zulip,rht/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,kou/zulip,kou/zulip