refactor(tvix/store): cargo clippy

Change-Id: I3a80560d036e7ed08036b5e9f0974080d1a30ded
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9096
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>

tvix/store/src/proto/tests/grpc_blobservice.rs

@@ -54,7 +54,7 @@ async fn put_read_stat() {
     // Send blob A.
     let put_resp = service
         .put(tonic_mock::streaming_request(vec![BlobChunk {
-            data: BLOB_A.clone().into(),
+            data: BLOB_A.clone(),
         }]))
         .await
         .expect("must succeed")