auto_remove_app_queue.user.js

// ==UserScript==
// @name            Auto Remove Bad-Region Apps
// @namespace       http://steamcommunity.com/id/zetx/
// @description     If app in queue is not allowed in region, automatically remove an app from the queue.
// @include         http://store.steampowered.com/app/*
// @version         1.1
// @run-at          document-end
// @grant           none
// ==/UserScript==

/*
Thanks
* http://stackoverflow.com/a/13734859
*/


function GM_main() {
    window.onload = function () {
        if ( $J('.error:contains("This item is currently unavailable in your region")').length ) {
            var unavailable_app = window.location.pathname.split('/')[2];
            $J.post("/app/7", { sessionid: g_sessionID, appid_to_clear_from_queue: unavailable_app })
            .done( function ( data ) {
                window.location = 'http://store.steampowered.com/explore/next';
                $J('.error').html( $J('.error').html() + '<br />(Removing from queue)' );
            }).fail( function() {
                $J('.error').html( $J('.error').html() + '<br />(Could not remove from queue. Reload or try <a href="https://www.reddit.com/r/Steam/comments/3r2k4y/how_do_i_complete_discovery_queue_if_every_queue/cwkrrzf">removing manually.</a>)' );
            } );
        }
    }
}

 addJS_Node(null, null, GM_main);

 //-- This is a standard-ish utility function:
 function addJS_Node(text, s_URL, funcToRun, runOnLoad) {
   var D                                   = document;
   var scriptNode                          = D.createElement ('script');
   if (runOnLoad) {
    scriptNode.addEventListener ("load", runOnLoad, false);
   }
   scriptNode.type                         = "text/javascript";
   if (text)       scriptNode.textContent  = text;
   if (s_URL)      scriptNode.src          = s_URL;
   if (funcToRun)  scriptNode.textContent  = '(' + funcToRun.toString() + ')()';

   var targ = D.getElementsByTagName ('head')[0] || D.body || D.documentElement;
   targ.appendChild (scriptNode);
 }