style: remove redundant final

Co-authored-by: Piotr Idzik <[email protected]>

Author: marysiuniq

src/main/java/com/thealgorithms/bitmanipulation/HighestSetBit.java

@@ -12,7 +12,7 @@ public final class HighestSetBit {
     private HighestSetBit() {
     }
 
-    public static final Optional<Integer> findHighestSetBit(int num) {
+    public static Optional<Integer> findHighestSetBit(int num) {
         if (num < 0) {
             throw new IllegalArgumentException("Input cannot be negative");
         }