BUG/MINOR: stconn: Don't set SE_FL_ERROR at the end of sc_conn_send()

When I reworked my series, this code was first removed and reinserted by
error. So let's remove it again.
diff --git a/src/stconn.c b/src/stconn.c
index 8c72e36..359e024 100644
--- a/src/stconn.c
+++ b/src/stconn.c
@@ -1664,8 +1664,6 @@
 	if (sc_ep_test(sc, SE_FL_ERROR | SE_FL_ERR_PENDING)) {
 		oc->flags |= CF_WRITE_EVENT;
 		BUG_ON(sc_ep_test(sc, SE_FL_EOS|SE_FL_ERROR|SE_FL_ERR_PENDING) == (SE_FL_EOS|SE_FL_ERR_PENDING));
-		if (sc_ep_test(sc, SE_FL_ERROR))
-			sc_ep_set(sc, SC_FL_ERROR);
 		return 1;
 	}