Don't install `/edx/bin/update` on devstacks.
Don't install `/edx/bin/update` on devstacks.

It doesn't work there and somewhat regularly causes confusion.
hastexo/edx-configuration,EDUlib/configuration,appsembler/configuration,EDUlib/configuration,mitodl/configuration,mitodl/configuration,appsembler/configuration,armaan/edx-configuration,arbrandes/edx-configuration,open-craft/configuration,hastexo/edx-configuration,Stanford-Online/configuration,gsehub/configuration,Stanford-Online/configuration,open-craft/configuration,proversity-org/configuration,nunpa/configuration,armaan/edx-configuration,jorgeomarmh/configuration,gsehub/configuration,hastexo/edx-configuration,edx/configuration,nunpa/configuration,gsehub/configuration,jorgeomarmh/configuration,proversity-org/configuration,open-craft/configuration,hks-epod/configuration,michaelsteiner19/open-edx-configuration,nunpa/configuration,rue89-tech/configuration,stvstnfrd/configuration,stvstnfrd/configuration,appsembler/configuration,mitodl/configuration,michaelsteiner19/open-edx-configuration,jorgeomarmh/configuration,arbrandes/edx-configuration,Stanford-Online/configuration,arbrandes/edx-configuration,open-craft/configuration,stvstnfrd/configuration,michaelsteiner19/open-edx-configuration,stvstnfrd/configuration,arbrandes/edx-configuration,Stanford-Online/configuration,hks-epod/configuration,armaan/edx-configuration,gsehub/configuration,proversity-org/configuration,proversity-org/configuration,hks-epod/configuration,arbrandes/edx-configuration,EDUlib/configuration,hastexo/edx-configuration,michaelsteiner19/open-edx-configuration,EDUlib/configuration,gsehub/configuration,Stanford-Online/configuration,nunpa/configuration,armaan/edx-configuration,rue89-tech/configuration,edx/configuration,mitodl/configuration,edx/configuration,rue89-tech/configuration,hks-epod/configuration,edx/configuration,hks-epod/configuration,jorgeomarmh/configuration,proversity-org/configuration,rue89-tech/configuration,rue89-tech/configuration,appsembler/configuration,stvstnfrd/configuration,EDUlib/configuration,hastexo/edx-configuration