settings: Remove unnecessary check of for_realm_settings.
settings: Remove unnecessary check of for_realm_settings.

We do not need to check for_realm_settings variable for
left_side_userlist handler since realm-level defaults
now uses save-discard widget and we return early in
that case and thus for_realm_settings will always be
false at this point.

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