[gnome-maps] xmldom: Remove __proto__ accessor

[Marcus Lundblad <mlundblad src gnome org>]

commit af5cd9e76d7f5fa2da0276a0f47753c61ab9333f
Author: Marcus Lundblad <ml update uu se>
Date:   Mon May 22 22:41:10 2017 +0200

    xmldom: Remove __proto__ accessor
    
    This is based on a change in upstream change. I kinda gave up on importing
    the new upstream files, as we did some patching previously, and just
    using the verbatim upstream files gives errors and warnings.
    At least, with this change loading GPX and KML layers still seem to work
    fine.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779867

 src/xmldom/dom.js |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/src/xmldom/dom.js b/src/xmldom/dom.js
index 1963067..0ec86d1 100644
--- a/src/xmldom/dom.js
+++ b/src/xmldom/dom.js
@@ -16,10 +16,6 @@ function copy(src,dest){
  */
 function _extends(Class,Super){
        var pt = Class.prototype;
-       if(Object.create){
-               var ppt = Object.create(Super.prototype)
-               pt.__proto__ = ppt;
-       }
        if(!(pt instanceof Super)){
                let t = function (){};
                t.prototype = Super.prototype;