disable wordpress canonical tag meta

found solution: before wp_head() command, insert:

remove_action('wp_head', 'rel_canonical');

p.s. if generator meta tag is being added from elsewhere (i.e. from theme or plugin, rather than wp-core) and was priority other than 10, then you might need to put the exact priority, as is was given from that theme/plugin:

i.e. remove_action('wp_head', 'rel_canonical', 47);