Remove a field from the job submission page

functions.php

add_filter( 'submit_job_form_fields', 'custom_submit_job_form_fields_dm' );

function custom_submit_job_form_fields_dm( $fields ) {
    // in this example, we remove the job_tags field
    unset($fields['job']['job_tags']);

    // And return the modified fields
    return $fields;
}