remove unnecessary backtrace (#280)

node/storage-async/src/lib.rs

@@ -2,7 +2,6 @@
 extern crate tracing;
 
 use anyhow::bail;
-use backtrace::Backtrace;
 use shared_types::{
     Chunk, ChunkArray, ChunkArrayWithProof, DataRoot, FlowProof, FlowRangeProof, Transaction,
 };
@@ -140,17 +139,13 @@ impl Store {
     {
         let store = self.store.clone();
         let (tx, rx) = oneshot::channel();
-        let mut backtrace = Backtrace::new();
-        let frames = backtrace.frames().to_vec();
-        backtrace = frames.into();
 
         self.executor.spawn_blocking(
             move || {
                 // FIXME(zz): Not all functions need `write`. Refactor store usage.
                 let res = f(&*store);
 
                 if tx.send(res).is_err() {
-                    warn!("Backtrace: {:?}", backtrace);
                     error!("Unable to complete async storage operation: the receiver dropped");
                 }
             },