remove old unused files for now

src/nixcmd.rs

@@ -1,27 +0,0 @@
-#[allow(unused_imports)]
-use crate::prelude::*;
-
-#[derive(Debug, Clone, PartialEq, Hash)]
-pub(crate) struct NixEvalExpr<E, A> {
-    pub(crate) expr: E,
-    pub(crate) attrpath: A,
-}
-
-impl<E, A> NixEvalExpr<E, A>
-where
-    E: AsRef<OsStr>,
-    A: AsRef<OsStr>,
-{
-    pub(crate) fn into_command(self) -> Command {
-        let mut cmd = Command::new("nix-instantiate");
-        cmd.arg("--eval")
-            .arg("--json")
-            .arg("--strict")
-            .arg("--expr")
-            .arg(self.expr)
-            .arg("-A")
-            .arg(self.attrpath);
-
-        cmd
-    }
-}