[ARROW-10704] [Rust][DataFusion] Remove Nested from expression enum

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Component/s: Rust - DataFusion
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26654
• Assignee: Daniël Heres
• Reporter: Daniël Heres
• Created: 23/Nov/20 18:39
• Updated: 11/Jan/23 08:15
• Resolved: 25/Nov/20 13:03

Description

Remove Nested from expression enum. It's not needed and never produced/used.

Issue Links

• links to: GitHub Pull Request #8750