swift

fc35ea6e - AST: Narrow the filtering of unavailable conformances to Sendable only

AST: Narrow the filtering of unavailable conformances to Sendable only Remove the allowUnavailable parameter to lookupConformance(), and instead explicitly check the result for hasUnavailableConformance() in the places where we used to pass 'false'. Also, narrow down this check in those places to the Sendable protocol only, fixing a regression with Hashable conformance synthesis. Fixes rdar://problem/94460143.