Revert "Add rare typo lien->line"

Since `lien` is a word frequently used when working with the Google
Terraform Provider, it feels wrong to treat it as a typo.

Humbly suggesting to revert that change

This reverts commit 536ccb5.

Fixes #3630

codespell_lib/data/dictionary_rare.txt

@@ -154,8 +154,6 @@ lamdas->lambdas
 leaded->led, lead,
 leas->least, lease,
 lief->leaf, life,
-lien->line
-liens->lines
 lightening->lightning, lighting,
 loafing->loading
 lod->load, loud, lode,