Remove obsolete comment

Author: jmikola

tests/SpecTests/Operation.php

@@ -654,10 +654,6 @@ private function executeForTestRunner(FunctionalTestCase $test, Context $context
                 return null;
             case 'assertSessionTransactionState':
                 $test->assertInstanceOf(Session::class, $args['session']);
-                /* PHPC currently does not expose the exact session state, but
-                 * instead exposes a bool to let us know whether a transaction
-                 * is currently in progress. This code may fail down the line
-                 * and should be adjusted once PHPC-1438 is implemented. */
                 $test->assertSame($this->arguments['state'], $args['session']->getTransactionState());
 
                 return null;