Remove type pineappl_subgrid from CAPI

CHANGELOG.md

@@ -14,6 +14,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - changed the type `ParseBinRemapperError` to allow capturing errors from
   `BinRemapper::new`
 
+### Removed
+
+- removed the type `SubGrid` that was exported in the CAPI as the type
+  `pineappl_subgrid`. This type was not used anymore and was a left-over of the
+  changes in the previous version.
+
 ## [0.6.3] - 12/12/2023
 
 ### Added

pineappl_capi/src/lib.rs

@@ -62,7 +62,6 @@
 use itertools::izip;
 use pineappl::bin::BinRemapper;
 use pineappl::grid::{Grid, GridOptFlags, Ntuple, Order};
-use pineappl::import_only_subgrid::ImportOnlySubgridV2;
 use pineappl::lumi::{LumiCache, LumiEntry};
 use pineappl::subgrid::{ExtraSubgridParams, SubgridParams};
 use std::collections::HashMap;
@@ -196,9 +195,6 @@ fn grid_params(key_vals: Option<&KeyVal>) -> (String, SubgridParams, ExtraSubgri
 #[derive(Default)]
 pub struct Lumi(Vec<LumiEntry>);
 
-/// DO NOT USE. This type had been used internally.
-pub struct SubGrid(ImportOnlySubgridV2);
-
 /// Returns the number of bins in `grid`.
 ///
 /// # Safety