fix class reference

Author: TomasVotruba

src/Rules/PHPUnit/PublicStaticDataProviderRule.php

@@ -51,7 +51,7 @@ public function processNode(Node $node, Scope $scope): array
 
         $classLike = $node->getOriginalNode();
         foreach ($classLike->getMethods() as $classMethod) {
-            if (! PHPUnitTestAnalyser::class::isTestClassMethod($classMethod)) {
+            if (! PHPUnitTestAnalyser::isTestClassMethod($classMethod)) {
                 continue;
             }