Fails if no mlxp override #10
Description
With the last version on pip, it fails when launched locally (without mlxpsub) and when there is not +mlxp. ... = ... overrides on the command line.
It seems to be because there is a overrides.pop("mlxp") without a check of whether this key is in the dict.
mlxp/mlxp/_internal/configure.py
Line 71 in 07d6848
Replacing it with
overrides.pop("mlxp", None)
fixes it for me