message: Remove arbitrary LineItemSchema from shared.js
  There was two LineItemSchema in shared.js, removed the one with the
  incorrect Tracking Type.
diff: @@ -43,17 +43,6 @@ module.exports.BrandingScheme = new Entity.SchemaObject({
  CreatedDateUTC: { type: Date }
  });
  -module.exports.LineItemSchema = new Entity.SchemaObject({
  - Description: { type: String },
  - Quantity: { type: Number },
  - UnitAmount: { type: Number },
  - AccountCode: { type: String },
  - ItemCode: { type: String },
  - TaxType: { type: String },
  - LineAmount: { type: Number },
  - Tracking: { type: String }
  -});
  -
  var InvoiceIDSchema = new Entity.SchemaObject({
  InvoiceID: { type: String, toObject: 'hasValue' },
  InvoiceNumber: { type: String, toObject: 'hasValue' }
  