clean up swift warnings

Author: scareything

lib/ZitiEnroller.swift

@@ -188,7 +188,7 @@ import CZitiPrivate
             cb(nil, nil, zErr)
             return
         }
-        let (data, response, error) = URLSession.shared.syncRequest(with: ctrlUrl)
+        let (_, _, error) = URLSession.shared.syncRequest(with: ctrlUrl)
         if let error = error {
             let zErr = ZitiError("connection to \(url) failed: \(error.localizedDescription)")
             log.error(String(describing: zErr), function:"enroll()")

lib/ZitiError.swift

@@ -16,7 +16,7 @@ limitations under the License.
 import Foundation
 
 /// Class used for passing information about error conditions encountered while using Ziti
-public class ZitiError : NSError {
+public class ZitiError : NSError, @unchecked Sendable {
     /// Initialize a ZitiError instance
     /// - Parameters:
     ///     - desc: error description