Remove deprecated App::getHostName() - process methods to DI::baseUrl()->getHostName()

src/App.php

@@ -299,18 +299,6 @@ class App
 		$this->baseURL->saveByURL($url);
 	}
 
-	/**
-	 * Returns the current hostname
-	 *
-	 * @return string
-	 *
-	 * @deprecated 2019.06 - use BaseURL->getHostname() instead
-	 */
-	public function getHostName()
-	{
-		return $this->baseURL->getHostname();
-	}
-
 	/**
 	 * Returns the current UserAgent as a String
 	 *