fmt and clippy

Author: robtandy

src/common/util.rs

@@ -1,10 +1,7 @@
-use datafusion::common::tree_node::{TreeNode, TreeNodeRecursion};
 use datafusion::error::Result;
-use datafusion::physical_plan::joins::PartitionMode;
 use datafusion::physical_plan::{displayable, ExecutionPlan, ExecutionPlanProperties};
 
 use std::fmt::Write;
-use std::sync::Arc;
 
 pub fn display_plan_with_partition_in_out(plan: &dyn ExecutionPlan) -> Result<String> {
     let mut f = String::new();

src/stage/execution_stage.rs

@@ -1,7 +1,6 @@
 use std::sync::Arc;
 
 use datafusion::common::internal_err;
-use datafusion::common::tree_node::{TreeNode, TreeNodeRecursion};
 use datafusion::error::{DataFusionError, Result};
 use datafusion::execution::TaskContext;
 use datafusion::physical_plan::ExecutionPlan;