chore(symfony-aop-bundle): 移除不必要的依赖并简化代码

Author: tourze-ci

src/Model/ProcessContext.php

@@ -18,7 +18,7 @@ public function getPid(): int
     public static function instance(int $pid): ProcessContext
     {
         if (!isset(static::$instances[$pid])) {
-            static::$instances[$pid] = new static($pid);
+            static::$instances[$pid] = new self($pid);
         }
         return static::$instances[$pid];
     }

src/Service/ContextService.php

@@ -8,8 +8,6 @@
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Contracts\Service\ResetInterface;
 use Tourze\Symfony\Aop\Model\ProcessContext;
-use Workerman\Timer;
-use Workerman\Worker;
 
 /**
  * 上下文管理
@@ -42,7 +40,7 @@ public function isCoroutineRuntime(): bool
      */
     public function isWorkerman(): bool
     {
-        return Worker::$pidFile !== '';
+        return class_exists(\Workerman\Worker::class) && \Workerman\Worker::$pidFile !== '';
     }
 
     public function isSwoole(): bool
@@ -78,7 +76,7 @@ public function defer(callable $callback): void
         }
 
         if ($this->isWorkerman()) {
-            Timer::add(0.001, $callback, persistent: false);
+            \Workerman\Timer::add(0.001, $callback, persistent: false);
             return;
         }