[FLINK-14945] Simplify some code in runtime

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: Runtime / Checkpointing, Runtime / Metrics, Runtime / Task
• Labels: pull-request-available
• Assignee: Shang Lou
• Reporter: Shang Lou
• Created: 26/Nov/19 05:12
• Updated: 27/Apr/21 18:05
• Resolved: 27/Nov/19 15:10

Description

I found some code to simplify when using IDEA to inspect the code,  so I submit a PR here, This change only involves code simplification 

Issue Links

• links to: GitHub Pull Request #10319