Remove dead Route::matchedPath methods and unused Http::$requestContainer

Removed instead of left as @deprecated — neither has been part of any
working code path since the previous commit, and keeping them around
just preserves footguns (the matched-path getter would silently return
'' on a route returned from Router::match).

Removed:
- Route::$matchedPath property
- Route::setMatchedPath() / Route::getMatchedPath()
- Http::$requestContainer property (never assigned)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: loks0n

src/Http/Http.php

@@ -48,13 +48,6 @@ class Http
 
     protected Container $container;
 
-    /**
-     * @deprecated Never assigned by the framework. Per-request state lives
-     * on the adapter's container (coroutine-local under Swoole). Will be
-     * removed in a future major release.
-     */
-    protected ?Container $requestContainer = null;
-
     /**
      * Current running mode
      */

src/Http/Route.php

@@ -38,8 +38,6 @@ class Route extends Hook
      */
     protected int $order;
 
-    protected string $matchedPath = '';
-
     public function __construct(string $method, string $path)
     {
         parent::__construct();
@@ -48,28 +46,6 @@ public function __construct(string $method, string $path)
         $this->order = ++self::$counter;
     }
 
-    /**
-     * @deprecated No longer used by the framework. The matched-path string
-     * is returned alongside the Route from Router::match() instead, so the
-     * shared Route singleton is not mutated per request. Will be removed
-     * in a future major release.
-     */
-    public function setMatchedPath(string $path): self
-    {
-        $this->matchedPath = $path;
-        return $this;
-    }
-
-    /**
-     * @deprecated No longer populated by Router::match(). Read the matched
-     * path from the second element of Router::match()'s return tuple
-     * instead. Will be removed in a future major release.
-     */
-    public function getMatchedPath(): string
-    {
-        return $this->matchedPath;
-    }
-
     /**
      * Get Route Order ID
      */