upgrade: Remove disused local_settings.py case.
upgrade: Remove disused local_settings.py case.

The local_settings.py file in the repo has been getting stale
for some time now, and I'm pretty sure this codepath is
never used.  Delete it.

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