GH-791 Remove commented-out code

Author: davidszkiba

classes/teststrategy/strategy.php

@@ -187,21 +187,6 @@ public function return_next_testitem(array $context) {
             }
         }
 
-        //if ($this->pre_check_first_question_selector()) {
-        //    $res = $this->first_question_selector();
-        //    if ($res->iserr()) {
-        //        return $res;
-        //    }
-        //    $val = $res->unwrap();
-        //    // If the result contains a single object, this is the question to be returned.
-        //    // Othewise, it contains the updated $context array with the ability and standarderror set in such a way, that the
-        //    // teststrategy will return the correct question (e.g. the question corresponding to mean ability of all students).
-        //    if (is_object($val)) {
-        //        return $res;
-        //    }
-        //    $this->context = $val;
-        //}
-
         // Core methods called in every strategy.
         $res = $this->update_personability();
         if ($res->iserr()) {