remove some unused codes.

datafusion/physical-plan/src/aggregates/row_hash.rs

@@ -35,7 +35,7 @@ use crate::stream::RecordBatchStreamAdapter;
 use crate::{aggregates, metrics, ExecutionPlan, PhysicalExpr};
 use crate::{RecordBatchStream, SendableRecordBatchStream};
 
-use arrow::{array::*, compute};
+use arrow::array::*;
 use arrow::datatypes::SchemaRef;
 use arrow_schema::SortOptions;
 use datafusion_common::utils::get_arrayref_at_indices;
@@ -1422,41 +1422,3 @@ impl GroupedHashAggregateStream {
         Ok(states_batch)
     }
 }
-
-// /// ```text
-// /// ┌─────┐           ┌─────┐            ┌─────┐
-// /// │true │           │NULL │            │NULL │
-// /// │true │    │      │true │            │true │
-// /// │true │ ───┼───   │false│  ────────▶ │false│       filtered_nulls
-// /// │false│    │      │NULL │            │false│
-// /// │false│           │true │            │false│
-// /// └─────┘           └─────┘            └─────┘
-// /// array           opt_filter           output
-// ///  .nulls()
-// ///
-// /// false = NULL    true  = pass          false = NULL       Meanings
-// /// true  = valid   false = filter        true  = valid
-// ///                 NULL  = filter
-// /// ```
-// ///
-// /// [`GroupsAccumulator::convert_to_state`]: datafusion_expr_common::groups_accumulator::GroupsAccumulator
-fn create_partitioned_filter() {
-    // We need a BooleanBuffer
-
-    // Firstly, we make sure the buffer is long enough
-
-
-    // Then we set the indexed slot to `true` if `equal to` partition_index, 
-    // and `false` if `not equal to`
-
-    // Finally, take `filter` into consider if it exists
-    //   - `buffer:true` + `filter:true` -> `buffer:true`
-    //   - `buffer:true` + `filter:false` -> `buffer:false`
-    //   - `buffer:true` + `filter:NULL` -> `buffer:NULL`
-    //   - `buffer:false` + `filter:true` -> `buffer:false`
-    //   - `buffer:false` + `filter:false` -> `buffer:false`
-    //   - `buffer:false` + `filter:NULL` -> `buffer:false`
-    let mut a = BooleanArray::from(vec![Some(true), Some(false), Some(true)]);
-    let buidler = a.into_data().into_builder();
-    compute::binary_mut(a, b, op)
-}