Remove unused FreeBSD 11 CI Vagrant file
Remove unused FreeBSD 11 CI Vagrant file

We are using Cirrus CI now.

[skip ci]

dipinhora/ponyc,ponylang/ponyc,sgebbie/ponyc,jemc/ponyc,kulibali/ponyc,cquinn/ponyc,dipinhora/ponyc,jemc/ponyc,ponylang/ponyc,ponylang/ponyc,jemc/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,cquinn/ponyc,kulibali/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,kulibali/ponyc,sgebbie/ponyc,cquinn/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,cquinn/ponyc,dipinhora/ponyc,kulibali/ponyc