remove redundant code

[dimbleby]

Not clear to me what this code was trying to do but it doesn't seem to be anything useful.

[sonarqubecloud]

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[radoering]

I have in mind that this was still required at some point when we moved the code from poetry to the export plugin and a test failed without it. Since no tests are failing it may not be required anymore.

Maybe, @abn has a better memory.

[dimbleby]

The code in the locker did get a big rework at python-poetry/poetry#5156, I wouldn't be at all surprised to learn that this made some workaround unnecessary

[abn]

A lot of things changed in core too since the groups work started. I recall from the initial rework for locker done in poetry 1.1.0 release a, lot of things were fudged.

From what I can tell it is no longer required and I am good with that.