remove yarn from conda env as it is not defined on mac
remove yarn from conda env as it is not defined on mac

jpallas/beakerx,twosigma/beaker-notebook,jpallas/beakerx,twosigma/beaker-notebook,twosigma/beakerx,twosigma/beaker-notebook,jpallas/beakerx,twosigma/beaker-notebook,jpallas/beakerx,twosigma/beaker-notebook,jpallas/beakerx,twosigma/beakerx,twosigma/beakerx,twosigma/beakerx,twosigma/beakerx,twosigma/beakerx,jpallas/beakerx