Followup on r483807.
jbeich commented on some ports in D17724 but I forgot to add them to the list.
Submitted by: rene
Reviewed by: bapt, jbeich
Differential Revision: https://reviews.freebsd.org/D17724
devel/icu: drop C++98 compatibility workarounds
Now that both USE_GCC and -CURRENT default to C++14 there's little
reason to complicate maintenance. Revert r449685 to usher consumers
into post-C++11 world.
PR: 222433222434222435