Remove unncessary hostname assignment in Inet6Address.initif

- The change was forgotten in 7u40 -> 8u60
- The assignment has been removed in upstream commit 8416:69a2dc92fefe
- holder.init does the same assignment

Bug: 64065632
Test: cts-tradefed run cts-dev --module CtsLibcoreOjTestCases
Change-Id: I76ba1af45023833fb3108bbc8d642aa4d85d05e3
1 file changed