refactor(tvix/store): clippy

Change-Id: I31ba268bda21c1f07c63520a269dd62f7b309e99
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9748
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

tvix/store/src/proto/mod.rs

@@ -150,7 +150,7 @@ impl PathInfo {
             }
             Some(castorepb::Node { node: Some(node) }) => {
                 node.validate()
-                    .map_err(|e| ValidatePathInfoError::InvalidRootNode(e))?;
+                    .map_err(ValidatePathInfoError::InvalidRootNode)?;
                 // parse the name of the node itself and return
                 parse_node_name_root(node.get_name(), ValidatePathInfoError::InvalidNodeName)?
             }