Remove >0 limitation in graph and demand slices

Author: dalonsoa

src/graph.rs

@@ -3,7 +3,7 @@ use crate::commodity::{CommodityID, CommodityMap, CommodityType};
 use crate::process::{ProcessID, ProcessMap};
 use crate::region::RegionID;
 use crate::time_slice::{TimeSliceInfo, TimeSliceLevel, TimeSliceSelection};
-use crate::units::{Dimensionless, Flow};
+use crate::units::Dimensionless;
 use anyhow::{Context, Result, anyhow, ensure};
 use indexmap::IndexSet;
 use itertools::{Itertools, iproduct};
@@ -202,7 +202,7 @@ fn prepare_commodities_graph_for_validation(
             && commodity
                 .demand
                 .get(&(region_id.clone(), year, time_slice_selection.clone()))
-                .is_some_and(|&v| v > Flow(0.0))
+                .is_some()
         {
             let commodity_node = GraphNode::Commodity(commodity_id.clone());
             let commodity_node_index = filtered_graph

src/input/commodity/demand_slicing.rs

@@ -1,7 +1,5 @@
 //! Demand slicing determines how annual demand is distributed across the year.
-use super::super::{
-    check_values_sum_to_one_approx, deserialise_proportion_nonzero, input_err_msg, read_csv,
-};
+use super::super::{check_values_sum_to_one_approx, input_err_msg, read_csv};
 use crate::commodity::CommodityID;
 use crate::id::IDCollection;
 use crate::input::commodity::demand::BorrowedCommodityMap;
@@ -22,7 +20,6 @@ struct DemandSlice {
     commodity_id: String,
     region_id: String,
     time_slice: String,
-    #[serde(deserialize_with = "deserialise_proportion_nonzero")]
     fraction: Dimensionless,
 }