Remove unnecessary is_file()

Author: staabm

src/Rules/PHPUnit/PHPUnitVersionDetector.php

@@ -8,7 +8,6 @@
 use function dirname;
 use function explode;
 use function file_get_contents;
-use function is_file;
 use function json_decode;
 
 class PHPUnitVersionDetector
@@ -32,16 +31,15 @@ public function createPHPUnitVersion(): PHPUnitVersion
 		if ($file !== false) {
 			$phpUnitRoot = dirname($file, 3);
 			$phpUnitComposer = $phpUnitRoot . '/composer.json';
-			if (is_file($phpUnitComposer)) {
-				$composerJson = @file_get_contents($phpUnitComposer);
-				if ($composerJson !== false) {
-					$json = json_decode($composerJson, true);
-					$version = $json['extra']['branch-alias']['dev-main'] ?? null;
-					if ($version !== null) {
-						$versionParts = explode('.', $version);
-						$majorVersion = (int) $versionParts[0];
-						$minorVersion = (int) $versionParts[1];
-					}
+
+			$composerJson = @file_get_contents($phpUnitComposer);
+			if ($composerJson !== false) {
+				$json = json_decode($composerJson, true);
+				$version = $json['extra']['branch-alias']['dev-main'] ?? null;
+				if ($version !== null) {
+					$versionParts = explode('.', $version);
+					$majorVersion = (int) $versionParts[0];
+					$minorVersion = (int) $versionParts[1];
 				}
 			}
 		}