Remove Java support (both the JAVA option and everything associated with
it as well as java from CATEGORIES) from this port.

After GCC 4.7 went end-of-life upstream in June 2014 there isn't much
use of that not better served by newer lang/gcc* ports and it speeds up
the build and simplifies this port significantly.

In addition to the expected changes to Makefile, pkg-plist, and pkg-descr,
this also removes files/java-patch-hier.