feat(objectionary#24): Remove the old puzzle and add one more new puzzle

src/main/java/org/eolang/jeo/Optimization.java

@@ -36,14 +36,6 @@
  * The entrypoint class for the optimization.
  *
  * @since 0.1.0
- * @todo #13:90min Add unit tests for Optimization class.
- *  The unit tests should cover the next cases:
- *  - The classes directory is empty.
- *  - The classes directory does not exist.
- *  - The classes directory has some clases.
- *  - The classes directory has some classes and some subdirectories.
- *  - The classes directory has some classes and some garbage.
- *  When the unit tests are ready, remove that puzzle.
  * @todo #13:90min Implement back transformation to bytecode.
  *  The Optimization class should transform the IRs back to bytecode.
  *  When the back transformation is ready, remove that puzzle.

src/test/java/org/eolang/jeo/OptimizationTest.java

@@ -39,6 +39,14 @@
  * Test case for {@link Optimization}.
  *
  * @since 0.1.0
+ * @todo #24:90min Add unit tests for Optimization class.
+ *  We still have to add the next unit tests:
+ *  - The classes directory is empty.
+ *  - The classes directory does not exist.
+ *  - The classes directory has some clases.
+ *  - The classes directory has some classes and some subdirectories.
+ *  - The classes directory has some classes and some garbage.
+ *  When the unit tests are ready, remove that puzzle.
  */
 class OptimizationTest {
 
@@ -58,4 +66,4 @@ void appliesAllBoosts(@TempDir final Path classes) throws IOException {
             Matchers.equalTo(true)
         );
     }
-}
+}