There are 3 related folders which needs to be deleted to free up the 2.5GB space in Mac. I was having similar issue and after deleting the 3 folders I could clear up the entire 2.5GB space.
I see that out of 3 you have deleted only 2 of them. You will need to delete the logic folder (2nd one in the list) to clear up your remaining space. Hope this helps.
- To remove GarageBand delete the GarageBand.app from Applications.
- Delete the folder /Library/Application Support/GarageBand/, if you are not using Logic or MainStage as well.
- Delete /Library/Application Support/Logic/.,if you are not using Logic or MainStage.
- Delete /Library/Audio/Apple Loops/ , if you are not using Logic or MainStage, or iMovie and need to keep the Sound Effects.
For more info, refer to this thread - How can I delete GarageBand on MacOS Sierra