Predicting TWL using time-varying foreshore slope is pretty slow, so let's remove it from our data analysis pipeline. The code is still there if we want to call it, but for the time being, let's remove this model when we're looking at comparisons.
impacts: ./data/interim/impacts_forecasted_foreshore_slope_sto06.csv ./data/interim/impacts_forecasted_premean_slope_sto06.csv ./data/interim/impacts_observed.csv##@products makes obsered and forecasted impacts