Removed obsolete (?) query that caused strange errors on phonegap

I was getting these strange errors that caused my entire application to get stuck in the initialization phase resulting in a whitescreen.
```
I/Database(608): sqlite returned: error code = 1,  msg = no such table: dbVersions
I/Database(608): sqlite returned: error code = 17, msg = prepared statement aborts at 73: [CREATE TABLE 'Flashcards' (key BLOB , inc INTEGER PRIMARY KEY AUTOINCREMENT , value BLOB)]
I/Database(608): sqlite returned: error code = 17, msg = prepared statement aborts at 17: [SELECT * FROM __sys__ where name = ?]
```

After hours and hours of debugging I found that removing the `SELECT * FROM dbVersions` query fixed the issue.