diff --git a/src/core/remove.js b/src/core/remove.js
deleted file mode 100644
index 1e9a5ecbc..000000000
--- a/src/core/remove.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/**
- * Patterns remove - send event when objects are removed from the DOM
- *
- * Copyright 2012 Simplon B.V. - Wichert Akkerman
- */
-import $ from "jquery";
-
-var real_cleanData = $.cleanData;
-
-$.cleanData = function remove_cleanData(elems) {
-    var i, el;
-    for (i = 0; (el = elems[i]) !== undefined; i++) $(el).triggerHandler("destroy");
-    real_cleanData.call(this, arguments);
-};
diff --git a/src/core/url.js b/src/core/url.js
deleted file mode 100644
index 601231d4f..000000000
--- a/src/core/url.js
+++ /dev/null
@@ -1,63 +0,0 @@
-/**
- * Patterns URL - URL parsing utilities
- *
- * Copyright 2013 Simplon B.V.
- */
-
-function UrlArgumentParser() {
-    this._cache = null;
-    if (window.addEventListener) window.addEventListener("popstate", this._reset);
-}
-
-UrlArgumentParser.prototype = {
-    space_pattern: /\+/g,
-    keyvalue_pattern: /^(.+?)(?:=(.*))/,
-
-    _reset: function UrlArgumentParser_reset() {
-        this._cache = null;
-    },
-
-    _decodeQS: function UrlArgumentParser_decodeQS(bit) {
-        return decodeURIComponent(bit.replace(this.space_pattern, " "));
-    },
-
-    _parse: function UrlArgumentParser_parse(qs) {
-        var query = /\?(.+)/.exec(qs),
-            params = {};
-
-        if (query === null) return params;
-
-        var parameters = query[1].split("&"),
-            i,
-            parts,
-            key,
-            value;
-
-        for (i = 0; i < parameters.length; i++) {
-            if ((parts = this.keyvalue_pattern.exec(parameters[i])) === null) {
-                key = this._decodeQS(parameters[i]);
-                value = null;
-            } else {
-                key = this._decodeQS(parts[1]);
-                value = this._decodeQS(parts[2]);
-            }
-
-            if (params[key] === undefined) params[key] = [];
-            params[key].push(value);
-        }
-
-        return params;
-    },
-
-    get: function UrlArgumentParser_get() {
-        if (this._cache === null) this._cache = this._parse(window.location.search);
-        return this._cache;
-    },
-};
-
-var url_parser = new UrlArgumentParser();
-
-export default {
-    UrlArgumentParser: UrlArgumentParser,
-    parameters: url_parser.get.bind(url_parser),
-};
diff --git a/src/core/url.test.js b/src/core/url.test.js
deleted file mode 100644
index 1f99fc728..000000000
--- a/src/core/url.test.js
+++ /dev/null
@@ -1,68 +0,0 @@
-import url from "./url";
-
-describe("Core / url / UrlArgumentParser", function () {
-    describe("_decodeQS", function () {
-        it("Basic string", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._decodeQS("Foo")).toBe("Foo");
-        });
-
-        it("String with whitespace", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._decodeQS("Aap+Noot+Mies")).toBe("Aap Noot Mies");
-        });
-
-        it("String with encoded characters", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._decodeQS("Jip%26Janneke")).toBe("Jip&Janneke");
-        });
-    });
-
-    describe("_parse", function () {
-        it("No query string", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("")).toEqual({});
-        });
-
-        it("No parameter specified", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?")).toEqual({});
-        });
-
-        it("Parameter without value", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?key")).toEqual({ key: [null] });
-        });
-
-        it("Parameter with empty value", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?key=")).toEqual({ key: [""] });
-        });
-
-        it("Parameter with plain value", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?key=value")).toEqual({ key: ["value"] });
-        });
-
-        it("Multiple parameters", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?one=en&two=to")).toEqual({
-                one: ["en"],
-                two: ["to"],
-            });
-        });
-
-        it("Parameter with multiple values", function () {
-            var parser = new url.UrlArgumentParser();
-            expect(parser._parse("?key=value&key=other")).toEqual({
-                key: ["value", "other"],
-            });
-        });
-    });
-});
-
-describe("Core / url / parameters", function () {
-    it("Bound to working parser", function () {
-        expect(url.parameters()).not.toBe(undefined);
-    });
-});
diff --git a/src/pat/slides/slides.js b/src/pat/slides/slides.js
index ece5cc7f6..a4a9d8d63 100644
--- a/src/pat/slides/slides.js
+++ b/src/pat/slides/slides.js
@@ -6,8 +6,6 @@
 import $ from "jquery";
 import registry from "../../core/registry";
 import utils from "../../core/utils";
-import url from "../../core/url";
-import "../../core/remove";
 
 var slides = {
     name: "slides",
@@ -24,9 +22,9 @@ var slides = {
         }
         await import("slides/src/slides"); // loads ``Presentation`` globally.
 
-        var parameters = url.parameters();
-        if (parameters.slides !== undefined) {
-            var requested_ids = slides._collapse_ids(parameters.slides);
+        const parameters = new URL(window.location.href).searchParams;
+        if (parameters.get("slides") !== null) {
+            var requested_ids = slides._collapse_ids(parameters.get("slides"));
             if (requested_ids) slides._remove_slides($el, requested_ids);
         }
         $el.each(function () {