Remove the transformation that shrinks overlapping roads.

[dabreegster]

159

This is indeed too blunt an instrument. I considered keeping it just for A/B Street, but I don't really want to rely on things we're not testing here, and it's only slightly helping in some situations that're broken anyway.

Some particularly notable regressions (where we were just kind of getting lucky before):

These were problems that came up in https://github.com/a-b-street/osm2streets/issues/136#issuecomment-1365287556. I think merging this first will make the transition to geometry-as-an-operation easier.

[dabreegster]

Noting that in the first example (seattle_slip_lane), there's overlap because we incorrectly infer sidewalks