Remove non-working curl config

These headers are overwritten by GNUNET's curl context, setting them
here is useless.

src/lib/auditor_api_curl_defaults.c

@@ -33,6 +33,9 @@ CURL *
 TAL_curl_easy_get (const char *url)
 {
   CURL *eh;
+  struct GNUNET_AsyncScopeSave scope;
+
+  GNUNET_async_scope_get (&scope);
 
   eh = curl_easy_init ();
 
@@ -48,26 +51,6 @@ TAL_curl_easy_get (const char *url)
                  curl_easy_setopt (eh,
                                    CURLOPT_TCP_FASTOPEN,
                                    1L));
-  {
-    /* Unfortunately libcurl needs chunk to be alive until after
-    curl_easy_perform.  To avoid manual cleanup, we keep
-    one static list here.  */
-    static struct curl_slist *chunk = NULL;
-    if (NULL == chunk)
-    {
-      /* With POST requests, we do not want to wait for the
-      "100 Continue" response, as our request bodies are usually
-      small and directy sending them saves us a round trip.
-
-      Clearing the expect header like this disables libcurl's
-      default processing of the header.
-
-      Disabling this header is safe for other HTTP methods, thus
-      we don't distinguish further before setting it.  */
-      chunk = curl_slist_append (chunk, "Expect:");
-    }
-    GNUNET_assert (CURLE_OK == curl_easy_setopt (eh, CURLOPT_HTTPHEADER, chunk));
-  }
 
   return eh;
 }