GP-4341 Force retained checkout if file is in-use during checkin or add-to-version-control. Deprecated upgrade concept during checkin. Revised manner in which file open for update is updated following a version control operation (perform DBHandle update).

Ghidra/Framework/SoftwareModeling/src/test/java/ghidra/program/model/StubProgram.java

@@ -536,11 +536,6 @@ public class StubProgram implements Program {
 		throw new UnsupportedOperationException();
 	}
 
-	@Override
-	public void invalidate() {
-		throw new UnsupportedOperationException();
-	}
-
 	@Override
 	public Register getRegister(String name) {
 		throw new UnsupportedOperationException();