chore(infrastructure): Disable SauceLabs temporarily on TravisCI (#208)
chore(infrastructure): Disable SauceLabs temporarily on TravisCI (#208)

- Clean up legacy notifications config

This is a temporary workaround for our CI until #143 and its subsequent
tasks are completed.
anton-kachurin/material-components-web,material-components/material-components-web,Yizhachok/material-components-web,pgbross/material-components-web,anton-kachurin/material-components-web,pgbross/material-components-web,material-components/material-components-web,Yizhachok/material-components-web,material-components/material-components-web