refactor(tvix/nix-compat): clippy

Change-Id: I56282d9754b42e0e6cdbb08e9ae71f5700d28dd1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9747
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI

tvix/nix-compat/src/nixhash/with_mode.rs

@@ -36,11 +36,11 @@ impl NixHashWithMode {
         Ok(match algo_and_mode.strip_prefix("r:") {
             Some(algo) => nixhash::NixHashWithMode::Recursive(nixhash::from_algo_and_digest(
                 algo.try_into()?,
-                &digest,
+                digest,
             )?),
             None => nixhash::NixHashWithMode::Flat(nixhash::from_algo_and_digest(
                 algo_and_mode.try_into()?,
-                &digest,
+                digest,
             )?),
         })
     }