Fix UnnecessaryBoxing

Author: durimkryeziu

simple-math/src/main/java/com/craftsmanshipinsoftware/math/console/PositiveInteger.java

@@ -32,17 +32,17 @@ public int intValue() {
 
     @Override
     public long longValue() {
-        return this.value.longValue();
+        return this.value;
     }
 
     @Override
     public float floatValue() {
-        return this.value.floatValue();
+        return this.value;
     }
 
     @Override
     public double doubleValue() {
-        return this.value.doubleValue();
+        return this.value;
     }
 
     @Override