Mobile applications storage expendable?
Needing to free up some storage on my Mini, I discovered I have 9.35 GB of "Mobile applications" in the iTunes folder. We don't even use iTunes to manage iOS apps in MacOS any more, right? So what's all that stuff doing on my hard drive? I can delete it, can't I? (I'm viewing it in the document browser that pops up when you view storage under "About This Mac" and click the "manage" button). Or are those files part of the iPhone and iPad backups I've stored on this computer?
Mac mini, macOS High Sierra (10.13.2), macmini6,2: late 2012 2.3 GHz i7