In my ios app with new Xcode 11 GM Seed 2 after deploy, apple returned error: ITMS-90683: Missing Purpose String in Info.plist with NSBluetoothAlwaysUsageDe
I had this exact same issue today. When I did a grep search I found that there is some reference to CoreBluetooth.framework inside my project.pbxproj
I removed the reference and building the app went fine. Uploaded to Apple and it got through so this worked for me.
To search use the following command
grep -r -a CoreBluetooth.framework ProjectFolder