settings: Remove dead code.
settings: Remove dead code.

This code has no effect on the checkbox in settings overlay.

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