chore: remove terraform fmt from check

I think that this may have been previously included by default in GitHub
actions runners, and then was removed. I don't see ever having any code
of my own which installed it.

Makefile

@@ -41,7 +41,6 @@ endif
 	./scripts/lint_todo.sh
 	cargo clippy --features production -- -D warnings
 	cargo fmt --check
-	terraform fmt --check
 	cargo test
 
 sqlx: