More cleanup

Author: kabiroberai

Sources/SKTestSupport/SkipUnless.swift

@@ -481,13 +481,8 @@ package actor SkipUnless {
     file: StaticString = #filePath,
     line: UInt = #line
   ) async throws {
-    struct NoSwiftInToolchain: Error {}
-
     return try await shared.skipUnlessSupported(file: file, line: line) {
       #if os(macOS)
-      guard let swift = await ToolchainRegistry.forTesting.default?.swift else {
-        throw NoSwiftInToolchain()
-      }
       let project = try await SwiftPMTestProject(files: [
         "MyFile.swift": """
         public func foo() {}