Refactor adjustment method selection

routes/adjustmentMethods/ManualAdjustmentMethod.ts

@@ -0,0 +1,17 @@
+import { AdjustmentMethod, AdjustmentMethodResponse } from "./AdjustmentMethod";
+
+
+/**
+ * Does not change the watering scale (only time data will be returned).
+ */
+async function calculateManualWateringScale( ): Promise< AdjustmentMethodResponse > {
+	return {
+		scale: undefined
+	}
+}
+
+
+const ManualAdjustmentMethod: AdjustmentMethod = {
+	calculateWateringScale: calculateManualWateringScale
+};
+export default ManualAdjustmentMethod;