• Delete all of the app’s data, including everything in RNFS.
• All data are stored in DocumentDirectoryPath/LessonPlans, so we delete the lesson plans folder and all files will be recursively deleted.
• Using RNFS.unlink() with the filepath DocumentDirectoryPath (a constant in RNFS) + "/LessonPlans"

static deleteAllData(): Boolean

• It will return a boolean of True if the deletion was successful

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