render_markdown_path: Remove unnecessary and broken caching.
render_markdown_path: Remove unnecessary and broken caching.

The pages in question are already cached automatically by Zulip, and
the lru_cache decorator doesn't work, since `context` might contain
unhashable objects.

j831/zulip,punchagan/zulip,brockwhittaker/zulip,j831/zulip,rishig/zulip,vabs22/zulip,Galexrt/zulip,jackrzhang/zulip,tommyip/zulip,brockwhittaker/zulip,vaidap/zulip,synicalsyntax/zulip,vabs22/zulip,shubhamdhama/zulip,jackrzhang/zulip,shubhamdhama/zulip,andersk/zulip,zulip/zulip,jrowan/zulip,hackerkid/zulip,mahim97/zulip,shubhamdhama/zulip,jphilipsen05/zulip,amanharitsh123/zulip,jackrzhang/zulip,dhcrzf/zulip,Galexrt/zulip,kou/zulip,rishig/zulip,punchagan/zulip,vabs22/zulip,showell/zulip,hackerkid/zulip,ryanbackman/zulip,andersk/zulip,Galexrt/zulip,tommyip/zulip,mahim97/zulip,timabbott/zulip,rishig/zulip,jphilipsen05/zulip,timabbott/zulip,verma-varsha/zulip,vaidap/zulip,Galexrt/zulip,kou/zulip,rht/zulip,timabbott/zulip,amanharitsh123/zulip,showell/zulip,showell/zulip,punchagan/zulip,brainwane/zulip,rht/zulip,hackerkid/zulip,jackrzhang/zulip,j831/zulip,zulip/zulip,verma-varsha/zulip,ryanbackman/zulip,brockwhittaker/zulip,eeshangarg/zulip,andersk/zulip,rht/zulip,rishig/zulip,mahim97/zulip,eeshangarg/zulip,synicalsyntax/zulip,brainwane/zulip,dhcrzf/zulip,timabbott/zulip,synicalsyntax/zulip,showell/zulip,dhcrzf/zulip,brainwane/zulip,tommyip/zulip,brockwhittaker/zulip,eeshangarg/zulip,ryanbackman/zulip,vabs22/zulip,kou/zulip,dhcrzf/zulip,vaidap/zulip,jackrzhang/zulip,jrowan/zulip,kou/zulip,christi3k/zulip,synicalsyntax/zulip,verma-varsha/zulip,hackerkid/zulip,christi3k/zulip,rht/zulip,mahim97/zulip,zulip/zulip,hackerkid/zulip,brockwhittaker/zulip,verma-varsha/zulip,rishig/zulip,andersk/zulip,punchagan/zulip,j831/zulip,amanharitsh123/zulip,kou/zulip,ryanbackman/zulip,jphilipsen05/zulip,zulip/zulip,synicalsyntax/zulip,shubhamdhama/zulip,dhcrzf/zulip,dhcrzf/zulip,eeshangarg/zulip,synicalsyntax/zulip,mahim97/zulip,eeshangarg/zulip,hackerkid/zulip,brockwhittaker/zulip,showell/zulip,eeshangarg/zulip,rishig/zulip,jackrzhang/zulip,Galexrt/zulip,tommyip/zulip,kou/zulip,kou/zulip,jrowan/zulip,SmartPeople/zulip,verma-varsha/zulip,hackerkid/zulip,vabs22/zulip,rishig/zulip,vaidap/zulip,zulip/zulip,jphilipsen05/zulip,SmartPeople/zulip,andersk/zulip,SmartPeople/zulip,rht/zulip,brainwane/zulip,timabbott/zulip,christi3k/zulip,shubhamdhama/zulip,j831/zulip,jrowan/zulip,tommyip/zulip,Galexrt/zulip,mahim97/zulip,andersk/zulip,amanharitsh123/zulip,christi3k/zulip,synicalsyntax/zulip,punchagan/zulip,punchagan/zulip,amanharitsh123/zulip,vabs22/zulip,jrowan/zulip,ryanbackman/zulip,vaidap/zulip,timabbott/zulip,j831/zulip,vaidap/zulip,SmartPeople/zulip,amanharitsh123/zulip,tommyip/zulip,jphilipsen05/zulip,rht/zulip,Galexrt/zulip,christi3k/zulip,SmartPeople/zulip,verma-varsha/zulip,jackrzhang/zulip,ryanbackman/zulip,shubhamdhama/zulip,brainwane/zulip,SmartPeople/zulip,tommyip/zulip,andersk/zulip,showell/zulip,zulip/zulip,showell/zulip,jphilipsen05/zulip,dhcrzf/zulip,christi3k/zulip,timabbott/zulip,zulip/zulip,brainwane/zulip,punchagan/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,shubhamdhama/zulip,jrowan/zulip