.show() is roughly equivalent to the CSS property: display=block.
.hide() is roughly equivalent to the CSS property: display=none.
Therefore: no remove or no delete.
sym.deleteSymbol() is identical to the remove() jQuery function.
It means: you delete or remove.
Note that sym.deleteSymbol() allows you to use the beforeDeletion panel.
On the one hand you show or hide tags (CSS properties are changed),
on the other hand you create or destroy tags.