refactor(natu): remove custom Nix linter

docs/TODO.md

@@ -3,7 +3,6 @@
 - machoke
 - falinks
 - dotfiles
-- natu
 - nix-style / refactor
 
 # project ideas
@@ -101,13 +100,6 @@
         - https://www.youtube.com/watch?v=kzcI5F4tGiU
         - https://www.youtube.com/watch?v=iKwPaB5TUdI
         - https://www.youtube.com/watch?v=A-CtdQFRX64
-- natu literature
-    - https://rust-analyzer.github.io/book/contributing/syntax.html?utm_source=chatgpt.com
-    - https://github.com/dotnet/roslyn/blob/main/docs/compilers/Design/Red-Green%20Trees.md?utm_source=chatgpt.com
-    - https://github.com/rust-analyzer/rowan/blob/master/examples/s_expressions.rs?utm_source=chatgpt.com
-    - https://dl.acm.org/doi/10.1145/964001.964011
-    - https://web.cecs.pdx.edu/~apt/esop15.pdf?utm_source=chatgpt.com
-    - https://www.researchgate.net/publication/2377179_Efficient_and_flexible_incremental_parsing?utm_source=chatgpt.com
 
 # tech debt