71f46056c9
This code was added in 846ecf59ff as an
escape hatch in case the new OAuth login flow would cause problems.
We have not received reports where the new flow caused problems, and
searching the internet shows no mentions of the env-var.
This env-var was not documented, so we can remove it.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>