Add no_unneeded_import_alias rule

Author: Jubeki

src/Config.php

@@ -138,6 +138,7 @@ class Config extends \PhpCsFixer\Config
             'statements' => ['break', 'clone', 'continue', 'echo_print', 'return', 'switch_case', 'yield'],
         ],
         'no_unneeded_braces' => true,
+        'no_unneeded_import_alias' => true,
         'no_unreachable_default_argument_value' => true,
         'no_unset_cast' => true,
         'no_unused_imports' => true,