Add missing virtual destructor for Timer::Callback (abstract) class

3 jobs for add_missing_virtual_destructors in 31 minutes and 26 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Build
passed build-linux #143152
linux

00:31:26

passed build-win #143153
win

00:27:48

 
  Deploy
manual deploy-devel #143154
conda linux allowed to fail manual