* Remove all return type.

misc/composer.json

@@ -2,6 +2,11 @@
     "require-dev": {
         "rector/rector": "0.16.*"
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Misc\\Rector\\": "rector/"
+        }
+    },
     "scripts": {
         "rector": [
             "Composer\\Config::disableProcessTimeout",

misc/rector.php

@@ -5,19 +5,21 @@ use Rector\Set\ValueObject\DowngradeLevelSetList;
 use Rector\Set\ValueObject\DowngradeSetList;
 use Rector\Core\ValueObject\PhpVersion;
 use Rector\Caching\ValueObject\Storage\FileCacheStorage;
+use Misc\Rector\RemoveReturnType;
 
 $version = getenv('PHP_VERSION');
 $version = $version ?: '72';
 $cacheDir = getenv('RECTOR_CACHE_DIR');
 $cacheDir = $cacheDir ?: '/tmp/rector_cached_files';
 
-return static function (RectorConfig $rectorConfig) use ($version,$cacheDir): void {
+return static function (RectorConfig $rectorConfig) use ($version, $cacheDir): void {
     $rectorConfig->skip([
         'test/*',
         'framework/zand',
     ]);
     $rectorConfig->phpVersion(constant(PhpVersion::class . '::PHP_' . $version));
     $rectorConfig->sets([constant(DowngradeLevelSetList::class . '::DOWN_TO_PHP_' . $version)]);
+    $rectorConfig->rule(RemoveReturnType::class);
     // $rectorConfig->sets([constant(DowngradeSetList::class . '::PHP_' . $version)]);
     $rectorConfig->cacheClass(FileCacheStorage::class);
     $rectorConfig->cacheDirectory($cacheDir);

misc/rector/RemoveReturnType.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Misc\Rector;
+
+use PhpParser\Node;
+use PhpParser\Node\Stmt\ClassMethod;
+use Rector\Core\Rector\AbstractRector;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+final class RemoveReturnType extends AbstractRector
+{
+    public function getRuleDefinition() : RuleDefinition
+    {
+        return new RuleDefinition('Remove return type from method', [new CodeSample(<<<'CODE_SAMPLE'
+final class SomeClass
+{
+    public function foo(): void
+    {
+    }
+}
+CODE_SAMPLE
+            , <<<'CODE_SAMPLE'
+final class SomeClass
+{
+    public function foo()
+    {
+    }
+}
+CODE_SAMPLE
+        )]);
+    }
+    /**
+     * @return array<class-string<Node>>
+     */
+    public function getNodeTypes() : array
+    {
+        return [ClassMethod::class];
+    }
+    /**
+     * @param ClassMethod $node
+     */
+    public function refactor(Node $node) : ?Node
+    {
+        $node->returnType = null;
+        return $node;
+    }
+}