Removed unused code

src/App.php

@@ -197,7 +197,6 @@ class App
 		$this->footerScripts[] = trim($url, '/');
 	}
 
-	public $process_id;
 	public $queue;
 	private $scheme;
 	private $hostname;
@@ -367,8 +366,6 @@ class App
 		$this->loadDefaultTimezone();
 
 		Core\L10n::init();
-
-		$this->process_id = Core\System::processID('log');
 	}
 
 	/**

src/Core/System.php

@@ -234,21 +234,6 @@ class System extends BaseObject
 		}
 	}
 
-	/**
-	 * Generates a process identifier for the logging
-	 *
-	 * @param string $prefix A given prefix
-	 *
-	 * @return string a generated process identifier
-	 */
-	public static function processID($prefix)
-	{
-		// We aren't calling any other function here.
-		// Doing so could easily create an endless loop
-		$trailer = $prefix . ':' . getmypid() . ':';
-		return substr($trailer . uniqid('') . mt_rand(), 0, 26);
-	}
-
 	/**
 	 * Returns the current Load of the System
 	 *