Remove unused logger and add CPU cores print statement

Eliminated the unused logger import and logger instance. Added a print statement to display the number of CPU cores available at runtime.

src/main/java/lazy/LazyStreams.java

@@ -1,10 +1,8 @@
 package lazy;
 
-import java.util.logging.Logger;
 import java.util.stream.IntStream;
 
 public class LazyStreams {
-    private static final Logger logger = Logger.getLogger(LazyStreams.class.getName());
 
     public static int multByTwo(int n) {
         System.out.printf("Inside multByTwo with arg %d on thread %s%n",
@@ -26,6 +24,7 @@ public static void main(String[] args) {
                 .findFirst().orElse(0);
         System.out.println(firstEvenDoubleDivBy3);
 
+        System.out.println("Number of cores: " + Runtime.getRuntime().availableProcessors());
 
         // Demonstrate laziness using print statements
         firstEvenDoubleDivBy3 = IntStream.rangeClosed(100, 2_000_000)