compose: Remove unused code.
compose: Remove unused code.

Since we don't use video button in compose control buttons
popover, this will never be reached. We can add this code again
when we add video button to the popvoer.

rht/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,kou/zulip,kou/zulip,eeshangarg/zulip,eeshangarg/zulip,zulip/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip,eeshangarg/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,kou/zulip,andersk/zulip,rht/zulip,andersk/zulip,rht/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip