Fixed nits reported by flutter analyze.

artob · artob · commit e2eb6aaa1eb8 · 2019-02-28T18:52:16.000+02:00
diff --git a/example/lib/schema_tab.dart b/example/lib/schema_tab.dart
@@ -2,8 +2,6 @@
 
 import 'dart:async';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart' show PlatformException;
-import 'package:flutter_sqlcipher/sqlite.dart';
 
 ////////////////////////////////////////////////////////////////////////////////
 
