Remove unused useEffect hooks in QuizRunner.tsx

client/src/components/QuizRunner.tsx

@@ -444,32 +444,6 @@ export default function QuizRunner({ defaultMode = 'all', defaultEntryId, autoSt
   const correctText = deriveCorrectText(currentQuestion);
   const shouldShowExplanation = showResult && (!lastCorrect || showExplanation);
 
-  useEffect(() => {
-    if (status !== 'running') return;
-    const saved = history[currentIndex];
-    if (saved) {
-      setResponse(saved.response);
-      setShowResult(true);
-      setLastCorrect(saved.correct);
-      setLastSkipped(saved.skipped);
-      setShowExplanation(saved.showExplanation);
-    } else {
-      resetQuestionState();
-    }
-  }, [currentIndex, history, status]);
-
-  useEffect(() => {
-    if (!showResult) return;
-    setHistory((prev) => {
-      const next = [...prev];
-      const existing = next[currentIndex];
-      if (existing) {
-        next[currentIndex] = { ...existing, showExplanation };
-      }
-      return next;
-    });
-  }, [showExplanation, showResult, currentIndex]);
-
   return (
     <div className="quiz-runner">
       <div className="quiz-top">