deps: Remove unused `indexmap` dep.

dimforge / rapier

2D and 3D physics engines focused on performance.

https://rapier.rs

Apache License 2.0

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Closed waywardmonkeys closed 1 year ago

waywardmonkeys commented 1 year ago

This was only enabled in the enhanced-determinism feature, but it wasn't actually used in these crates.

sebcrozet commented 1 year ago

Thanks!