fixup: comments from paul

Author: Hans Larsen

dfx/src/commands/canister/query.rs

@@ -62,7 +62,7 @@ where
             reject_code,
             reject_message,
         }) => Err(DfxError::ClientError(reject_code, reject_message)),
-        /// TODO: remove this when moving to ic_http_api.
+        // TODO: remove this when moving to ic_http_api.
         Ok(ReadResponse::Unknown) => Err(DfxError::Unknown("Unknown response".to_owned())),
         Err(x) => Err(x),
     }

dfx/src/lib/api_client.rs

@@ -230,7 +230,7 @@ pub fn call(
     canister_id: CanisterId,
     method_name: String,
     arg: Option<Blob>,
-) -> impl Future<Item = Option<Blob>, Error = DfxError> {
+) -> impl Future<Item = (), Error = DfxError> {
     submit(
         client,
         SubmitRequest::Call {
@@ -244,10 +244,7 @@ pub fn call(
         result(
             response
                 .error_for_status()
-                .map(|response| {
-                    eprintln!("{:?}", response);
-                    None
-                })
+                .map(|_| ())
                 .map_err(DfxError::from),
         )
     })