The corresponding hook in D6 is just called hook_taxonomy
.
It is called thusly: hook_taxonomy($op, $type, $array = NULL)
where:
$op
is one of'delete'
,'insert'
,'update'
$type
is one of'vocabulary'
,'term'
,- and
$array
is the thing that$op
is being done to.
So in your case an example implementation of that hook would go like this:
function example_taxonomy($op, $type, $array = NULL) {
if ('term' == $type && 'delete' == $op) {
// Execute the code here
}
}