Container, BaseControl: removed fallback to ObjectMixin

Author: dg

src/Forms/Container.php

@@ -420,9 +420,6 @@ public function __call(string $name, array $args)
 	{
 		if (isset(self::$extMethods[$name])) {
 			return (self::$extMethods[$name])($this, ...$args);
-		} elseif ($callback = Nette\Utils\ObjectMixin::getExtensionMethod($class = __CLASS__, $name)) {
-			trigger_error("Define extension method '$name' via $class::extensionMethod('$name', ...), don't use Nette\\Object or Nette\\Utils\\ObjectMixin.", E_USER_DEPRECATED);
-			return $callback($this, ...$args);
 		}
 		return parent::__call($name, $args);
 	}

src/Forms/Controls/BaseControl.php

@@ -590,11 +590,6 @@ public function __call(string $name, array $args)
 			}
 			$class = get_parent_class($class);
 		} while ($class);
-
-		if ($callback = Nette\Utils\ObjectMixin::getExtensionMethod($class = static::class, $name)) {
-			trigger_error("Define extension method '$name' via $class::extensionMethod('$name', ...), don't use Nette\\Object or Nette\\Utils\\ObjectMixin.", E_USER_DEPRECATED);
-			return $callback($this, ...$args);
-		}
 		return parent::__call($name, $args);
 	}