remove un-necessary #if TracingSupport guard

Author: ktoso

Sources/AsyncHTTPClient/RequestBag.swift

@@ -252,9 +252,7 @@ final class RequestBag<Delegate: HTTPClientResponseDelegate & Sendable>: Sendabl
 
     private func receiveResponseHead0(_ head: HTTPResponseHead) {
         self.delegate.didVisitURL(task: self.task, self.loopBoundState.value.request, head)
-        #if TracingSupport
         self.loopBoundState.value.endRequestSpan(response: head)
-        #endif // TracingSupport
 
         // runs most likely on channel eventLoop
         switch self.loopBoundState.value.state.receiveResponseHead(head) {