Update Sources/Testing/ExitTests/WaitFor.swift

Co-authored-by: Jonathan Grynspan <[email protected]>

Author: michael-yuji

Sources/Testing/ExitTests/WaitFor.swift

@@ -85,7 +85,7 @@ private let _childProcessContinuations = Locked<[pid_t: CheckedContinuation<Exit
 /// A condition variable used to suspend the waiter thread created by
 /// `_createWaitThread()` when there are no child processes to await.
 private nonisolated(unsafe) let _waitThreadNoChildrenCondition = {
-  #if os(FreeBSD) || os(OpenBSD)
+  #if os(FreeBSD)
   let result = UnsafeMutablePointer<pthread_cond_t?>.allocate(capacity: 1)
   #else
   let result = UnsafeMutablePointer<pthread_cond_t>.allocate(capacity: 1)