diff --git a/src/Routing/RouteCollection.php b/src/Routing/RouteCollection.php
deleted file mode 100644
index 685916849be..00000000000
--- a/src/Routing/RouteCollection.php
+++ /dev/null
@@ -1,275 +0,0 @@
-<?php
-/**
- * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
- * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
- *
- * Licensed under The MIT License
- * Redistributions of files must retain the above copyright notice.
- *
- * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
- * @link          http://cakephp.org CakePHP(tm) Project
- * @since         3.0.0
- * @license       http://www.opensource.org/licenses/mit-license.php MIT License
- */
-namespace Cake\Routing;
-
-use Cake\Network\Request;
-use Cake\Routing\Route\Route;
-
-/**
- * RouteCollection is used to operate on a set of routes.
- * It stores routes both in a linear list in order of connection, as well
- * as storing them in a hash-table indexed by a routes' name.
- *
- */
-class RouteCollection implements \Countable {
-
-/**
- * A hash table of routes indexed by route names.
- * Used for reverse routing.
- *
- * @var array
- */
-	protected $_routeTable = [];
-
-/**
- * A list of routes connected, in the order they were connected.
- * Used for parsing incoming urls.
- *
- * @var array
- */
-	protected $_routes = [];
-
-/**
- * The top most request's context. Updated whenever
- * requests are pushed/popped off the stack in Router.
- *
- * @var array
- */
-	protected $_requestContext = [
-		'_base' => '',
-		'_port' => 80,
-		'_scheme' => 'http',
-		'_host' => 'localhost',
-	];
-
-/**
- * Add a route to the collection.
- *
- * Appends the route to the list of routes, and the route hashtable.
- *
- * @param \Cake\Routing\Route\Route $route The route to add
- * @return void
- */
-	public function add(Route $route) {
-		$name = $route->getName();
-		if (!isset($this->_routeTable[$name])) {
-			$this->_routeTable[$name] = [];
-		}
-		$this->_routeTable[$name][] = $route;
-		$this->_routes[] = $route;
-	}
-
-/**
- * Reverse route or match a $url array with the defined routes.
- * Returns either the string URL generate by the route, or false on failure.
- *
- * @param array $url The url to match.
- * @return void
- */
-	public function match($url) {
-		$names = $this->_getNames($url);
-		unset($url['_name']);
-		foreach ($names as $name) {
-			if (isset($this->_routeTable[$name])) {
-				$output = $this->_matchRoutes($this->_routeTable[$name], $url);
-				if ($output) {
-					return $output;
-				}
-			}
-		}
-		return $this->_matchRoutes($this->_routes, $url);
-	}
-
-/**
- * Matches a set of routes with a given $url and $params
- *
- * @param array $routes An array of routes to match against.
- * @param array $url The url to match.
- * @return mixed Either false on failure, or a string on success.
- */
-	protected function _matchRoutes($routes, $url) {
-		for ($i = 0, $len = count($routes); $i < $len; $i++) {
-			$match = $routes[$i]->match($url, $this->_requestContext);
-			if ($match) {
-				return strlen($match) > 1 ? trim($match, '/') : $match;
-			}
-		}
-		return false;
-	}
-
-/**
- * Get the set of names from the $url.  Accepts both older style array urls,
- * and newer style urls containing '_name'
- *
- * @param array $url The url to match.
- * @return string The name of the url
- */
-	protected function _getNames($url) {
-		$name = false;
-		if (isset($url['_name'])) {
-			$name = $url['_name'];
-		}
-		$plugin = false;
-		if (isset($url['plugin'])) {
-			$plugin = $url['plugin'];
-		}
-		$fallbacks = [
-			'%2$s:%3$s',
-			'%2$s:_action',
-			'_controller:%3$s',
-			'_controller:_action'
-		];
-		if ($plugin) {
-			$fallbacks = [
-				'%1$s.%2$s:%3$s',
-				'%1$s.%2$s:_action',
-				'%1$s._controller:%3$s',
-				'%1$s._controller:_action',
-				'_plugin._controller:%3$s',
-				'_plugin._controller:_action',
-				'_controller:_action'
-			];
-		}
-		foreach ($fallbacks as $i => $template) {
-			$fallbacks[$i] = strtolower(sprintf($template, $plugin, $url['controller'], $url['action']));
-		}
-		if ($name) {
-			array_unshift($fallbacks, $name);
-		}
-		return $fallbacks;
-	}
-
-/**
- * Takes the URL string and iterates the routes until one is able to parse the route.
- *
- * @param string $url Url to parse.
- * @return array An array of request parameters parsed from the url.
- */
-	public function parse($url) {
-		$queryParameters = null;
-		if (strpos($url, '?') !== false) {
-			list($url, $queryParameters) = explode('?', $url, 2);
-			parse_str($queryParameters, $queryParameters);
-		}
-		$out = array();
-		for ($i = 0, $len = count($this); $i < $len; $i++) {
-			$r = $this->_routes[$i]->parse($url);
-			if ($r !== false && $queryParameters) {
-				$r['?'] = $queryParameters;
-				return $r;
-			}
-			if ($r !== false) {
-				return $r;
-			}
-		}
-		return $out;
-	}
-
-/**
- * Promote a route (by default, the last one added) to the beginning of the list.
- * Also promotes the route to the head of its named slice in the named route
- * table.
- *
- * @param int $which A zero-based array index representing
- *    the route to move. For example,
- *    if 3 routes have been added, the last route would be 2.
- * @return bool Returns false if no route exists at the position
- *    specified by $which.
- */
-	public function promote($which) {
-		if ($which === null) {
-			$which = count($this->_routes) - 1;
-		}
-		if (!isset($this->_routes[$which])) {
-			return false;
-		}
-		$route =& $this->_routes[$which];
-		unset($this->_routes[$which]);
-		array_unshift($this->_routes, $route);
-
-		$name = $route->getName();
-		$routes = $this->_routeTable[$name];
-		$index = array_search($route, $routes, true);
-		unset($this->_routeTable[$name][$index]);
-		array_unshift($this->_routeTable[$name], $route);
-		return true;
-	}
-
-/**
- * Get route(s) out of the collection.
- *
- * If a string argument is provided, the first matching
- * route for the provided name will be returned.
- *
- * If an integer argument is provided, the route
- * with that index will be returned.
- *
- * @param mixed $index The index or name of the route you want.
- * @return mixed Either the route object or null.
- */
-	public function get($index) {
-		if (is_string($index)) {
-			$routes = isset($this->_routeTable[$index]) ? $this->_routeTable[$index] : [null];
-			return $routes[0];
-		}
-		return isset($this->_routes[$index]) ? $this->_routes[$index] : null;
-	}
-
-/**
- * Get the list of all connected routes.
- *
- * @return array.
- */
-	public function all() {
-		return $this->_routes;
-	}
-
-/**
- * Part of the countable interface.
- *
- * @return int The number of connected routes.
- */
-	public function count() {
-		return count($this->_routes);
-	}
-
-/**
- * Populate the request context used to generate URL's
- * Generally set to the last/most recent request.
- *
- * @param \Cake\Network\Request $request Request instance.
- * @return void
- */
-	public function setContext(Request $request) {
-		$this->_requestContext = [
-			'_base' => $request->base,
-			'_port' => $request->port(),
-			'_scheme' => $request->scheme(),
-			'_host' => $request->host()
-		];
-	}
-
-/**
- * Sets which extensions routes will use.
- *
- * @param array $extensions The extensions for routes to use.
- * @return void
- */
-	public function parseExtensions(array $extensions) {
-		foreach ($this->_routes as $route) {
-			$route->parseExtensions($extensions);
-		}
-	}
-
-}