Revert "vagrant: Switch Virtualbox to use NFS for syncing files."
Revert "vagrant: Switch Virtualbox to use NFS for syncing files."

This reverts commit 4d7f1e7c88c5cb50a3367470b107e7fc600ef0a1.

Apparently, Vagrant's parsing seems to result in this demanding a
network connection.  Further investigation is needed.

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