[FLINK-33578] Remove scala-2.12 system variable

• Type: Technical Debt
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.18.0, 1.19.0
• Fix Version/s: 1.19.0
• Component/s: Build System, Build System / CI
• Labels: pull-request-available
• Assignee: Matthias Pohl
• Reporter: Matthias Pohl
• Created: 17/Nov/23 05:31
• Updated: 17/Nov/23 12:11
• Resolved: 17/Nov/23 12:09

Description

We're only relying on Scala 2.12 right now. Now need to have the scala version specified. This makes the build system scripts easier.

Issue Links

• Discovered while testing: FLINK-27075 Migrate CI from Azure to Github Actions
• links to: GitHub Pull Request #23738