Revert "Remove more specific PHPDoc @return from PHP 8.1 stubs"

This reverts commit d9dd6bf.

Author: ondrejmirtes

extractor/extract.php

@@ -4,7 +4,6 @@
 use PhpParser\Comment;
 use PhpParser\Node;
 use PhpParser\ParserFactory;
-use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocChildNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTagNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ReturnTagValueNode;
@@ -594,30 +593,6 @@ private function compareFunctions(Node\FunctionLike $old, Node\FunctionLike $new
 			}
 		}
 
-		if (
-			$old->getReturnType() !== null
-			&& $new->getReturnType() !== null
-			&& $new->getDocComment() !== null
-		) {
-			if ($old->getDocComment() === null || $this->findPhpDocReturn($this->parseDocComment($old->getDocComment()->getText())) === null) {
-				$newPhpDocNode = $this->parseDocComment($new->getDocComment()->getText());
-				if ($this->findPhpDocReturn($newPhpDocNode) !== null) {
-					$newPhpDocNodeWithoutReturn = new PhpDocNode(array_values(array_filter($newPhpDocNode->children, function (PhpDocChildNode $child): bool {
-						if (!$child instanceof PhpDocTagNode) {
-							return true;
-						}
-
-						return !$child->value instanceof ReturnTagValueNode;
-					})));
-					if (count($newPhpDocNodeWithoutReturn->children) === 0) {
-						$old->setAttribute('comments', []);
-					} else {
-						$old->setDocComment(new Comment\Doc((string) $newPhpDocNodeWithoutReturn));
-					}
-				}
-			}
-		}
-
 		$oldPhpDocParameters = [];
 		$newPhpDocParameters = [];
 		if ($old->getDocComment() !== null) {