docs(README): remove remaining TODOs

I decided I'm not worried about packaging since this project has no
external dependencies.

Author: maybebyte

README.md

@@ -60,10 +60,3 @@ $ mandoc -l docs/wg_to_hostname_if.1
 There is also a generated Markdown file in the same directory so
 you can [read the man page on
 GitHub](https://github.com/maybebyte/wg_to_hostname_if/blob/main/docs/wg_to_hostname_if.md).
-
-## TODOs
-
-- Documentation:
-  - README.md
-- Packaging (I'm considering flit due to its relative simplicity
-  compared to other solutions).