remove.lineage without intermediary taxon

Is it possible to remove lineage without specifying higher level taxon?
For example SILVA reference has lineage like
Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae;Incertae_Sedis;
Bacteria;Firmicutes;Clostridia;Clostridiales;Family_XIII;Incertae_Sedis;
Bacteria;Firmicutes;Bacilli;Bacillales;Family_XII;Incertae_Sedis;
and so on.

If I need to remove all these undefined Incertae_Sedis taxa, then how can I put it in the remove.lineage command?
Like this? remove.lineage(taxon=Bacteria;;;;;Incertae_Sedis)?

Can you try:

remove.lineage(taxon=Incertae_Sedis)