fix(tvix/eval): address current clippy & grfn lints

Change-Id: I65c6feb9f817b5b367d37204a1f57acfe4100d97
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6430
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

tvix/eval/src/eval.rs

@@ -24,7 +24,7 @@ pub fn interpret(code: &str, location: Option<PathBuf>) -> EvalResult<Value> {
             eprintln!("parse error: {}", err);
         }
         return Err(Error {
-            kind: ErrorKind::ParseErrors(errors.to_vec()).into(),
+            kind: ErrorKind::ParseErrors(errors.to_vec()),
             span: file.span,
         });
     }