We don't need mbstring dependency

Author: kukulich

SlevomatCodingStandard/Helpers/AnnotationHelper.php

@@ -27,8 +27,8 @@
 use PHPStan\PhpDocParser\Ast\Type\UnionTypeNode;
 use function count;
 use function in_array;
-use function mb_strlen;
 use function sprintf;
+use function strlen;
 use function strtolower;
 
 /**
@@ -336,15 +336,15 @@ private static function getEndPointer(
 			$annotationNode->getAttribute(Attribute::START_INDEX),
 			$annotationNode->getAttribute(Attribute::END_INDEX) + 1
 		);
-		$annotationLength = mb_strlen($annotationContent, $phpcsFile->config->encoding);
+		$annotationLength = strlen($annotationContent);
 
 		$searchPointer = $annotationStartPointer;
 
 		$content = '';
 		for ($i = $annotationStartPointer; $i < count($tokens); $i++) {
 			$content .= $tokens[$i]['content'];
 
-			if (mb_strlen($content, $phpcsFile->config->encoding) >= $annotationLength) {
+			if (strlen($content) >= $annotationLength) {
 				$searchPointer = $i;
 				break;
 			}

composer.json

@@ -17,7 +17,6 @@
 	},
 	"require": {
 		"php": "^7.2 || ^8.0",
-		"ext-mbstring": "*",
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.6.2 || ^0.7 || ^1.0",
 		"phpstan/phpdoc-parser": "^1.22.0",
 		"squizlabs/php_codesniffer": "^3.7.1"