[CLEANUP] Remove superfluous Rector rule (#1333)

Since #1201, this becomes a duplicate.

Author: JakeQZ

config/rector.php

@@ -6,7 +6,6 @@
 use Rector\PHPUnit\Set\PHPUnitSetList;
 use Rector\Set\ValueObject\LevelSetList;
 use Rector\Set\ValueObject\SetList;
-use Rector\TypeDeclaration\Rector\ClassMethod\AddVoidReturnTypeWhereNoReturnRector;
 
 return RectorConfig::configure()
     ->withPaths(
@@ -35,7 +34,4 @@
         PHPUnitSetList::PHPUNIT_80,
         // PHPUnitSetList::PHPUNIT_CODE_QUALITY,
     ])
-    ->withRules([
-        AddVoidReturnTypeWhereNoReturnRector::class,
-    ])
     ->withImportNames(true, true, false);