swift

0301b1c4 - [AutoDiff] Optimize constrained derivative generic signature computation.

[AutoDiff] Optimize constrained derivative generic signature computation. Computing constrained derivative generic signatures is costly: remove unnecessary uses in the differentiation transform. The only remaining use is `[differentiable]` attribute construction, where it is necessary for correctness. Other users now extract the constrained derivative generic signature from a `[differentiable]` attribute.