Revert "Add '-w' option to ip[6]tables-restore"

This reverts commit 1d12f7bb86fba1d65938ed2c85b7a0f11424281b.

This is being reverted to minimize diffs with upstream and will
be cherry-picked once upstream is merged.

Bug: 36108349
Test: see top of change stack.
Change-Id: I1851882e4c388bc139ce718d111e58e702dcc58a
2 files changed