remove slice test function

src/record_batch.rs

@@ -297,31 +297,6 @@ impl RecordBatch {
         let Self { columns, schema } = self;
         (columns, schema)
     }
-
-    /// Return a new RecordBatch where each column is sliced
-    /// according to `offset` and `length`
-    ///
-    /// # Panics
-    ///
-    /// Panics if `offset` with `length` is greater than column length.
-    pub fn slice(&self, offset: usize, length: usize) -> RecordBatch {
-        if self.schema.fields().is_empty() {
-            assert!((offset + length) == 0);
-            return RecordBatch::new_empty(self.schema.clone());
-        }
-        assert!((offset + length) <= self.num_rows());
-
-        let columns = self
-            .columns()
-            .iter()
-            .map(|column| column.slice(offset, length).into())
-            .collect();
-
-        Self {
-            schema: self.schema.clone(),
-            columns,
-        }
-    }
 }
 
 /// Options that control the behaviour used when creating a [`RecordBatch`].