[FLINK-20807] Cleanup checkstyle suppressions files

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Component/s: Build System
• Labels: pull-request-available
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 29/Dec/20 19:15
• Updated: 28/May/21 06:59
• Resolved: 30/Dec/20 10:28

Description

With spotless formatting having landed this is a good opportunity to remove or narrow down various checkstyle suppressions.

Issue Links

• links to: GitHub Pull Request #14522