Remove unused Subgrid::shape and Grid::interpolations

pineappl/src/empty_subgrid.rs

@@ -18,10 +18,6 @@ impl Subgrid for EmptySubgridV1 {
         Vec::new()
     }
 
-    fn shape(&mut self) -> &[usize] {
-        panic!("EmptySubgridV1 doesn't have a shape");
-    }
-
     fn is_empty(&self) -> bool {
         true
     }

pineappl/src/grid.rs

@@ -205,12 +205,6 @@ impl Grid {
         &mut self.pid_basis
     }
 
-    /// Return a vector containing the interpolation specifications for this grid.
-    #[must_use]
-    pub fn interpolations(&self) -> &[Interp] {
-        &self.interps
-    }
-
     /// Return a vector containing the kinematic specifications for this grid.
     #[must_use]
     pub fn kinematics(&self) -> &[Kinematics] {

pineappl/src/import_subgrid.rs

@@ -112,10 +112,6 @@ impl Subgrid for ImportSubgridV1 {
         Box::new(self.array.indexed_iter())
     }
 
-    fn shape(&mut self) -> &[usize] {
-        self.array.shape()
-    }
-
     fn stats(&self) -> Stats {
         Stats {
             total: self.array.shape().iter().product(),

pineappl/src/interp_subgrid.rs

@@ -52,10 +52,6 @@ impl Subgrid for InterpSubgridV1 {
         self.array.is_empty()
     }
 
-    fn shape(&mut self) -> &[usize] {
-        self.array.shape()
-    }
-
     fn merge(&mut self, other: &SubgridEnum, transpose: Option<(usize, usize)>) {
         // we cannot use `Self::indexed_iter` because it multiplies with `reweight`
         if let SubgridEnum::InterpSubgridV1(other) = other {

pineappl/src/subgrid.rs

@@ -74,9 +74,6 @@ pub trait Subgrid {
     /// Scale the subgrid by `factor`.
     fn scale(&mut self, factor: f64);
 
-    /// Return the shape of the subgrid
-    fn shape(&mut self) -> &[usize];
-
     /// Assume that the convolution functions for indices `a` and `b` for this grid are the same
     /// and use this to optimize the size of the grid.
     fn symmetrize(&mut self, a: usize, b: usize);