Revert "More clear error message when db.open failed"
Revert "More clear error message when db.open failed"

This reverts commit f2420a7c800b81f3dbe5fefc15abbaa6065e4f8e.

dfahlander/Dexie.js,YuriSolovyov/Dexie.js,chrahunt/Dexie.js,jimmywarting/Dexie.js,dfahlander/Dexie.js,cesarmarinhorj/Dexie.js,YuriSolovyov/Dexie.js,chrahunt/Dexie.js,chrahunt/Dexie.js,cesarmarinhorj/Dexie.js,jacobmarshall/ng-dexie,chrahunt/Dexie.js,jimmywarting/Dexie.js,jimmywarting/Dexie.js,jacobmarshall/ng-dexie,dfahlander/Dexie.js,dfahlander/Dexie.js,jimmywarting/Dexie.js