remove unused code, use multiple calls using StringBuilder

Author: Prototype206

app/src/main/java/hexlet/code/games/Even.java

@@ -14,10 +14,8 @@ public static void startGameEven() {
 
 
 	public static String generateCorrectAnswer() {
-		StringBuilder correctAnswer = new StringBuilder();
 		final int evenDivisor = 2;
 		final int oddRemainder = 1;
-		correctAnswer.setLength(0);
 		int randomNumber = random.nextInt(100);
 		System.out.println("Question: " + randomNumber);
 

app/src/main/java/hexlet/code/games/Prime.java

@@ -1,6 +1,6 @@
 package hexlet.code.games;
 
-import static hexlet.code.Engine.random;;
+import static hexlet.code.Engine.random;
 
 public final class Prime {
 	private Prime() {

app/src/main/java/hexlet/code/games/Progression.java

@@ -31,15 +31,14 @@ public static String generateCorrectAnswer() {
 
 	public static void generateProgression() {
 		StringBuilder progressionString = new StringBuilder();
-		progressionString.setLength(0);
 		progressionString.append("Question: ");
 		for(int i = 0; i < progressionLength; i++) {
 			if(i == numberToSkip) {
 				progressionString.append(".. ");
 				sumOfNumbers += numberTwo;
 				continue;
 			}
-			progressionString.append(sumOfNumbers + " ");
+			progressionString.append(sumOfNumbers).append(" ");
 			sumOfNumbers += numberTwo;
 		}
 		System.out.println(progressionString.toString());