Remove unused variable

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.0 M1, Master
• Fix Version/s: 7.1.0 M2, 7.1.X, 7.2.X, Master
• Component/s: Business Productivity > Kaleo Designer
• Labels: None
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/19626

Remove unused variable themeDisplay in DeleteKaleoDefinitionVersionMVCActionCommand