-----------------------  chrome.bookmarks.remove
this can remove a bookmark (with a given id)  or  an empty bookmark folder.

// window.my_url gives url in my bMark_2017 wali ext.
// you can use a string or simply location.href

chrome.bookmarks.search({url: window.my_url }, function (btn_arr){
    console.log(btn_arr[0].id, btn_arr);
    chrome.bookmarks.remove(btn_arr[0].id, function(t){
        // Note: t here gives nothing. So, don't use anything. i have kept
        // just to make this sure. t returns 'undefined'.
        console.log(t, "removed bMark with id: ", btn_arr[0].id);
    });
});