RFR 8191173 : (cl) Clarify or remove "for delegation" in ClassLoader spec

[Brent Christian]

Hi,

Please review my change to this small bit of ClassLoader spec that can 
be tidied up, as noticed by Martin.

Issue:
https://bugs.openjdk.java.net/browse/JDK-8191173
Webrev:
http://cr.openjdk.java.net/~bchristi/8191173/webrev.00/

In java.lang.ClassLoader these methods:
   getParent()
   getPlatformClassLoader()
   getSystemClassLoader()
all state that the returned classloader is, "for delegation."

For getParent() this makes sense to mention.  But it seems unnecessary 
for the other two methods, which are static, and designed to always 
return the indicated classloader.  The getSystemClassLoader() docs go on 
to immediately mention that the system classloader is the default 
delegation parent.

Omitting the phrase makes the spec more concise.

Thanks,
-Brent