Fixed Obsolete Code ignore list

Author: Volodymyr Kublytskyi

dev/tests/static/testsuite/Magento/Test/Legacy/ObsoleteCodeTest.php

@@ -112,7 +112,7 @@ public function testPhpFiles()
         $changedFiles = ChangedFiles::getPhpFiles(__DIR__ . '/../_files/changed_files*');
         $blacklistFiles = $this->getBlacklistFiles();
         foreach ($blacklistFiles as $blacklistFile) {
-            unset($changedFiles[BP . $blacklistFile]);
+            unset($changedFiles[$blacklistFile]);
         }
         $invoker(
             function ($file) {
@@ -920,7 +920,7 @@ private function processPattern($appPath, $pattern)
 
         $fileSet = glob($appPath . DIRECTORY_SEPARATOR . $pattern, GLOB_NOSORT);
         foreach ($fileSet as $file) {
-            $files[] = substr($file, $relativePathStart);
+            $files[] = ltrim(substr($file, $relativePathStart), '/');
         }
 
         return $files;