duplicate implementation

[hawkbee1]

objc[3731]: Class FileUtils is implemented in both /System/Library/PrivateFrameworks/OSAnalytics.framework/OSAnalytics (0x20a41f7d0) and /private/var/containers/Bundle/Application/8E98778F-6FBE-40B3-94AD-97CB6E0B24FE/Runner.app/Frameworks/file_picker.framework/file_picker (0x1036cd570). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.