There is no filter or way to stop those Ajax calls. However, you can alter the response of Ajax call by using filter term_search_min_chars
.
Which is actually to customize minimum number of characters after that Ajax will print the response. So we can make it 0
to never print the response!
/**
* Remove tag search suggestions
* @param int $tax The minimum number of characters required. Default 2.
* @return int
*/
function remove_tag_suggestions($tax) {
//You can place your condition if you want!
return 0;
}
add_filter('term_search_min_chars', 'remove_tag_suggestions');
PS: I am not sure why do you want to remove this wonderful feature!
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