Revert "binderhub: 0.2.0-n557.h46ddaac...0.2.0-n562.h0b4462c"#1901

betatim merged 1 commit intomasterjupyterhub/mybinder.org-deploy:masterfrom

revert-1900-binderhub_bumpjupyterhub/mybinder.org-deploy:revert-1900-binderhub_bumpCopy head branch name to clipboard