<?php
add_action( 'admin_init', 'imagify_only_admin' );
function imagify_only_admin(){
    if (current_user_can('administrator')){
        remove_filter( 'manage_media_columns', '_imagify_manage_media_custom_column' );
        remove_filter( 'manage_media_columns', '_imagify_manage_media_columns' );
        remove_filter( 'attachment_fields_to_edit', '_imagify_attachment_fields_to_edit');
        remove_filter( 'media_row_actions', '_imagify_add_actions_to_media_list_row');

    }

}