Revert "namedirectory: prevent deadlock on destruction"

Reason for revert: breaks the design

Change-Id: Ib94d36d5f671628ddfcbaaa4fef180821e7a79e3

src/jamidht/namedirectory.cpp

@@ -162,9 +162,6 @@ NameDirectory::lookupAddress(const std::string& addr, LookupCallback cb)
         setHeaderFields(*request);
         request->add_on_done_callback(
             [this, cb = std::move(cb), reqid, addr](const dht::http::Response& response) {
-                if (response.status_code == 0) {
-                    return;
-                }
                 if (response.status_code >= 400 && response.status_code < 500) {
                     cb("", Response::notFound);
                 } else if (response.status_code != 200) {
@@ -251,9 +248,6 @@ NameDirectory::lookupName(const std::string& n, LookupCallback cb)
         setHeaderFields(*request);
         request->add_on_done_callback([this, reqid, name, cb = std::move(cb)](
                                           const dht::http::Response& response) {
-            if (response.status_code == 0) {
-                return;
-            }
             if (response.status_code >= 400 && response.status_code < 500)
                 cb("", Response::notFound);
             else if (response.status_code < 200 || response.status_code > 299)