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: I42c8b0aebdbd8b73a90606c0a999f25d8d071cd1
diff --git a/rootdir/etc/hosts b/rootdir/etc/hosts
index 2e506a8..649151c 100644
--- a/rootdir/etc/hosts
+++ b/rootdir/etc/hosts
@@ -1,2 +1,2 @@
 127.0.0.1       localhost
-::1             localhost ip6-localhost
+::1             ip6-localhost