Revert "[Test] Update test to comply with etc/hosts change."

Revert "Add ::1 to localhost in etc/hosts"

Revert submission 2291455-localhost_v6

Reason for revert: b/258627476
Reverted Changes:
Icd11fab47:[Test] Update test to comply with etc/hosts change...
Ibcee52a14:Add ::1 to localhost in etc/hosts

Bug: 258627476
Change-Id: Ie00df8fd5aa24e51ceac62de369bcf3aabb8116d