Remove spurious call to unread_ops.process_visible().
Remove spurious call to unread_ops.process_visible().

In stream_list.js we have some code to handle narrow activations,
and we were calling unread_ops.process_visible() only for
stream activations, not for PM-related activations, etc., so
our approach was inconsistent.

It also turns out that the call is redundant, since we call
unread_ops.process_visible() when the message pane scrolls as
part of updating the content.

Ideally, we want a more rigorous approach where we make this
call precisely when the new messages become visible to the user,
but the purpose of this fix is to de-clutter the stream_list
logic.

jackrzhang/zulip,synicalsyntax/zulip,Galexrt/zulip,andersk/zulip,kou/zulip,vabs22/zulip,verma-varsha/zulip,verma-varsha/zulip,jackrzhang/zulip,hackerkid/zulip,zulip/zulip,synicalsyntax/zulip,punchagan/zulip,rishig/zulip,kou/zulip,synicalsyntax/zulip,timabbott/zulip,jrowan/zulip,zulip/zulip,rht/zulip,brockwhittaker/zulip,rht/zulip,zulip/zulip,rishig/zulip,dhcrzf/zulip,rht/zulip,verma-varsha/zulip,jrowan/zulip,hackerkid/zulip,rht/zulip,verma-varsha/zulip,synicalsyntax/zulip,punchagan/zulip,hackerkid/zulip,zulip/zulip,eeshangarg/zulip,showell/zulip,andersk/zulip,tommyip/zulip,tommyip/zulip,jrowan/zulip,brainwane/zulip,shubhamdhama/zulip,vabs22/zulip,Galexrt/zulip,punchagan/zulip,rht/zulip,brainwane/zulip,synicalsyntax/zulip,andersk/zulip,amanharitsh123/zulip,shubhamdhama/zulip,brainwane/zulip,andersk/zulip,hackerkid/zulip,brainwane/zulip,vaidap/zulip,jackrzhang/zulip,brainwane/zulip,vaidap/zulip,amanharitsh123/zulip,jackrzhang/zulip,Galexrt/zulip,amanharitsh123/zulip,vabs22/zulip,rht/zulip,Galexrt/zulip,vabs22/zulip,dhcrzf/zulip,showell/zulip,timabbott/zulip,jrowan/zulip,timabbott/zulip,mahim97/zulip,vaidap/zulip,showell/zulip,brockwhittaker/zulip,punchagan/zulip,punchagan/zulip,shubhamdhama/zulip,jrowan/zulip,brockwhittaker/zulip,eeshangarg/zulip,Galexrt/zulip,vabs22/zulip,synicalsyntax/zulip,jackrzhang/zulip,eeshangarg/zulip,shubhamdhama/zulip,punchagan/zulip,tommyip/zulip,tommyip/zulip,eeshangarg/zulip,Galexrt/zulip,jackrzhang/zulip,showell/zulip,shubhamdhama/zulip,mahim97/zulip,eeshangarg/zulip,dhcrzf/zulip,rht/zulip,showell/zulip,brainwane/zulip,amanharitsh123/zulip,amanharitsh123/zulip,rishig/zulip,mahim97/zulip,tommyip/zulip,amanharitsh123/zulip,kou/zulip,mahim97/zulip,dhcrzf/zulip,verma-varsha/zulip,punchagan/zulip,andersk/zulip,Galexrt/zulip,eeshangarg/zulip,zulip/zulip,synicalsyntax/zulip,vaidap/zulip,hackerkid/zulip,mahim97/zulip,brockwhittaker/zulip,mahim97/zulip,showell/zulip,verma-varsha/zulip,eeshangarg/zulip,timabbott/zulip,hackerkid/zulip,andersk/zulip,rishig/zulip,vaidap/zulip,jrowan/zulip,kou/zulip,vabs22/zulip,rishig/zulip,vaidap/zulip,tommyip/zulip,brockwhittaker/zulip,rishig/zulip,dhcrzf/zulip,tommyip/zulip,brockwhittaker/zulip,brainwane/zulip,hackerkid/zulip,showell/zulip,rishig/zulip,shubhamdhama/zulip,kou/zulip,timabbott/zulip,dhcrzf/zulip,dhcrzf/zulip,shubhamdhama/zulip,zulip/zulip,zulip/zulip,kou/zulip,andersk/zulip,jackrzhang/zulip,timabbott/zulip,kou/zulip,timabbott/zulip