8.9.3: Simplify implicit declaration of values() and valueOf(String)

Since the introduction of enum types in Java SE 5, section 8.9.3 of the JLS has included the following javadoc for the implicit enum member `public static E[] values()`:

/**
* Returns an array containing the constants of this enum
* type, in the order they're declared. This method may be
* used to iterate over the constants as follows:
*
* for(E c : E.values())
* System.out.println(c);
* ...

The tip about the for-each loop may have been reasonable for Java SE 5.0, but it not necessary today and has been removed from the generated javadoc via JDK-8173730 in JDK 12.