swift

bb5df9dd - GSB: Use redundant requirements graph to diagnose redundant conformance requirements

GSB: Use redundant requirements graph to diagnose redundant conformance requirements This almost completely guts checkConformanceConstraints(), and removes a usage of checkConstraintList(). Yet another one of those refactorings that leaves the GSB in an intermediate state, with some new logic that's cleaner, while leaving behind old code for other use cases that haven't been refactored yet.