RFR: JDK-8186873: Possible dead code "com.sun.tools.javac.tree.TreeInfo.isAnonymousDiamond()" which was added in 9

[Jan Lahoda]

Hi,

I'd like to ask for a review for removal of a method that is (as far as 
I can tell) unused.

Bug: https://bugs.openjdk.java.net/browse/JDK-8186873
Webrev: http://cr.openjdk.java.net/~jlahoda/8186873/webrev.00/

Thanks,
     Jan