revert cs change

Author: mvorisek

benchmark/benchmark.php

@@ -150,11 +150,8 @@ function runValgrindPhpCgiCommand(
  * @return decimal-int-string
  */
 function extractInstructionsFromValgrindOutput(string $output): string {
-    if (!preg_match("(==[0-9]+== Events    : Ir\n==[0-9]+== Collected : (?<instructions>[0-9]+))", $output, $matches)) {
-        throw new \Exception('Unexpected valgrind output');
-    }
-
-    return $matches['instructions'];
+    preg_match("(==[0-9]+== Events    : Ir\n==[0-9]+== Collected : (?<instructions>[0-9]+))", $output, $matches);
+    return $matches['instructions'] ?? throw new \Exception('Unexpected valgrind output');
 }
 
 main();