[scripts] Remove unnecessary logic from stop script

[brada4]

Always remove table and service state to have consistent cleaned up system state on exit even if user intentionally dropped our table. Removes dependency on grep as a consequence.

Ref: https://wiki.nftables.org/wiki-nftables/index.php/Configuring_tables Supersedes: https://github.com/openwrt/firewall4/pull/33

Signed-off-by: Andris PE [email protected]

[brada4]

Hi @jow- According to "upstream documentation" no need to perform any checks before deleting table since kernel 4.9.0.

[jow-]

Merged via 00fc6943a29732375addf72a12f2381df5b25428 with slightly changed commit subject.