Stop including enhanced for-loop tip for enum values() method

Since JDK 5, the javadoc for the implicit values() method of an enum has included text like:

"This [values()] method may be used to iterate over the constants as follows:

for (RoundingMode c : RoundingMode.values())
    System.out.println(c);"

This text was a useful tip in 2004 when JDK 5 shipped and the enhanced for-loop was new, but it should be assumed as common knowledge now and thus just clutter in the javadoc output.