Remove two flags for feature shipped in m95
--harmony_intl_displaynames_v2
--harmony_intl_more_timezone

Bug: v8:11637, v8:11661
Change-Id: I9432865722664f64c64b5bf7fde5e05e6b324b20
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3292518Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78005}