remove unused -e flag from README
remove unused -e flag from README

ioet/chrome-uploader,pazaan/chrome-uploader,pazaan/chrome-uploader,urmc-costik/chrome-uploader,ioet/chrome-uploader,tidepool-org/chrome-uploader,urmc-costik/chrome-uploader,ioet/chrome-uploader,urmc-costik/chrome-uploader,tidepool-org/chrome-uploader,tidepool-org/chrome-uploader,pazaan/chrome-uploader