PHP8: deprecated code

Problem/Motivation

When upgrading to PHP8, I got this warning:

FILE: /taxonomy_manager/taxonomy_manager.admin.inc
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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 864 | WARNING | Declaring a required parameter after an optional one is deprecated since PHP 8.0. Parameter $tid is optional, while parameter $vid1 is required.
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Steps to reproduce

Upgrade server to PHP8, then run a drush command and see warning.

Proposed resolution

Update parameters in function declaration.