diff --git a/framework/yii/BaseYii.php b/framework/yii/BaseYii.php
index ad93d42..cf9a96f 100644
--- a/framework/yii/BaseYii.php
+++ b/framework/yii/BaseYii.php
@@ -110,33 +110,6 @@ class BaseYii
 	}
 
 	/**
-	 * Imports a set of namespaces.
-	 *
-	 * By importing a namespace, the method will create an alias for the directory corresponding
-	 * to the namespace. For example, if "foo\bar" is a namespace associated with the directory
-	 * "path/to/foo/bar", then an alias "@foo/bar" will be created for this directory.
-	 *
-	 * This method is typically invoked in the bootstrap file to import the namespaces of
-	 * the installed extensions. By default, Composer, when installing new extensions, will
-	 * generate such a mapping file which can be loaded and passed to this method.
-	 *
-	 * @param array $namespaces the namespaces to be imported. The keys are the namespaces,
-	 * and the values are the corresponding directories.
-	 */
-	public static function importNamespaces($namespaces)
-	{
-		foreach ($namespaces as $name => $path) {
-			if ($name !== '') {
-				$name = trim(strtr($name, ['\\' => '/', '_' => '/']), '/');
-				if (is_array($path)) {
-					$path = reset($path);
-				}
-				static::setAlias('@' . $name, rtrim($path, '/\\') . '/' . $name);
-			}
-		}
-	}
-
-	/**
 	 * Translates a path alias into an actual path.
 	 *
 	 * The translation is done according to the following procedure: