dnf_transaction_commit(): Remove second call to rpmtsSetVSFlags

Remove a incorrect second call to rpmtsSetVSFlags right after disabling the
signature checking. Since rpmtsSetVSFlags returns the old flags, calling
it again with the return value from the first call would result in not
disabling anything.

libdnf/dnf-transaction.cpp

@@ -1123,7 +1123,6 @@ dnf_transaction_commit(DnfTransaction *transaction, HyGoal goal, DnfState *state
     gboolean ret = FALSE;
     gint rc;
     gint verbosity;
-    gint vs_flags;
     guint i;
     guint j;
     DnfState *state_local;
@@ -1386,8 +1385,7 @@ dnf_transaction_commit(DnfTransaction *transaction, HyGoal goal, DnfState *state
         goto out;
 
     /* no signature checking, we've handled that already */
-    vs_flags = rpmtsSetVSFlags(priv->ts, _RPMVSF_NOSIGNATURES | _RPMVSF_NODIGESTS);
-    rpmtsSetVSFlags(priv->ts, vs_flags);
+    rpmtsSetVSFlags(priv->ts, _RPMVSF_NOSIGNATURES | _RPMVSF_NODIGESTS);
 
     /* filter diskspace */
     if (!dnf_context_get_check_disk_space(priv->context))