[ARROW-11951] [Rust] Remove OffsetSize::prefix

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: Rust
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27786
• Assignee: Andrew Lamb
• Reporter: Andrew Lamb
• Created: 13/Mar/21 11:27
• Updated: 11/Jan/23 08:23
• Resolved: 14/Mar/21 10:40

Description

Background:
Left over cleanups suggested by from @sunchao on https://github.com/apache/arrow/pull/9425

Broken out from https://github.com/apache/arrow/pull/9508

Rationale:
This function is redundant with `OffsetSize::is_large`

Issue Links

• links to: GitHub Pull Request #9690