I built an app with sencha cmd - "sencha build production" and when I run my app through Fiddler I can see it downloading /ext/classic/classic/src/picker/Date.js and /ext/classic/classic/src/form/field/Date.js, and also in my classic.json file that gets compiled I can see references to pickers in there too.

I'm not "requiring" those classes anywhere in my app, so I thought CMD was only spuposed to include files required for the app to run? Am I doing something wrong or do I have to specifically "exclude" files in build.xml that I don't want included in the build?