Fix overhead allocation tests, clean up some imports

src/graph/mod.rs

@@ -7,7 +7,6 @@ use std::{
 };
 
 use chrono::Local;
-use futures::lock::Mutex;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use split::{SplitNode, SplitNodeRunner};

src/graph/pull_from_db.rs

@@ -1,14 +1,12 @@
 use super::sql::QueryExecutor;
 use crate::graph::node::RunnableNode;
-use crate::graph::upload_to_db::{upload_file_bulk, DBType};
+use crate::graph::upload_to_db::DBType;
 use crate::io::{DataSource, RecordSerializer};
 use async_trait::async_trait;
-use polars::prelude::CsvWriter;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use sqlx::AnyPool;
-use std::collections::BTreeMap;
-use tiberius::{AuthMethod, Config, EncryptionLevel};
+use tiberius::{Config, EncryptionLevel};
 use tokio_util::compat::TokioAsyncWriteCompatExt;
 
 /**
@@ -90,7 +88,6 @@ mod tests {
             .await?;
         let host = container.get_host().await?;
         let port = container.get_host_port_ipv4(1433).await?;
-        let port = 1433;
         let connection_string = format!("jdbc:sqlserver://{}:{};username=sa;password=TestOnlyContainer123", host, port).to_owned();
         let connection_string = "jdbc:sqlserver://localhost:1433;username=sa;password=TestOnlyContainer123;Encrypt=False".to_owned();
 
@@ -108,7 +105,7 @@ mod tests {
         };
         runner.run().await?;
         let mut result_contents = String::new();
-        let result_length = File::open("test_pull.csv")?.read_to_string(&mut result_contents)?;
+        let _ = File::open("test_pull.csv")?.read_to_string(&mut result_contents)?;
         assert_eq!(
             "Test
 1

src/graph/sql.rs

@@ -1,6 +1,5 @@
 use futures::TryStreamExt;
 use futures_io::{AsyncRead, AsyncWrite};
-use itertools::Itertools;
 use sqlx::{Any, Column, Pool, Row};
 use std::borrow::Borrow;
 use std::collections::BTreeMap;

src/graph/sql_rule.rs

@@ -3,8 +3,7 @@ use std::fs::File;
 use super::node::RunnableNode;
 use crate::io::{DataSource, SourceType};
 use async_trait::async_trait;
-use polars::io::SerReader;
-use polars::prelude::{IntoLazy, LazyFrame, ParquetReader, ScanArgsParquet};
+use polars::prelude::{LazyFrame, ScanArgsParquet};
 use polars::{
     io::SerWriter,
     prelude::{CsvWriter, LazyCsvReader, LazyFileListReader},