Remove Set2Set not working

Author: aurorarossi

GNNLux/src/layers/pool.jl

@@ -131,41 +131,3 @@ function TopKPool(adj::AbstractMatrix, k::Int, in_channel::Int; init = glorot_un
 end
 
 (t::TopKPool)(x::AbstractArray, ps, st) = GNNlib.topk_pool(t, x)
-
-
-@doc raw"""
-    Set2Set(n_in, n_iters, n_layers = 1)
-
-Set2Set layer from the paper [Order Matters: Sequence to sequence for sets](https://arxiv.org/abs/1511.06391).
-
-For each graph in the batch, the layer computes an output vector of size `2*n_in` by iterating the following steps `n_iters` times:
-```math
-\mathbf{q} = \mathrm{LSTM}(\mathbf{q}_{t-1}^*)
-\alpha_{i} = \frac{\exp(\mathbf{q}^T \mathbf{x}_i)}{\sum_{j=1}^N \exp(\mathbf{q}^T \mathbf{x}_j)} 
-\mathbf{r} = \sum_{i=1}^N \alpha_{i} \mathbf{x}_i
-\mathbf{q}^*_t = [\mathbf{q}; \mathbf{r}]
-```
-where `N` is the number of nodes in the graph, `LSTM` is a Long-Short-Term-Memory network with `n_layers` layers, input size `2*n_in` and output size `n_in`.
-
-Given a batch of graphs `g` and node features `x`, the layer returns a matrix of size `(2*n_in, n_graphs)`.
-```
-"""
-struct Set2Set{L} <: GNNContainerLayer{(:lstm,)}
-    lstm::L
-    num_iters::Int
-end
-
-function Set2Set(n_in::Int, n_iters::Int, n_layers::Int = 1)
-    @assert n_layers == 1 "multiple layers not implemented yet" #TODO
-    n_out = 2 * n_in
-    lstm = Lux.LSTMCell(n_out => n_in)
-    return Set2Set(lstm, n_iters)
-end
-
-function (l::Set2Set)(g, x, ps, st)
-    lstm = StatefulLuxLayer{true}(l.lstm, ps.lstm, _getstate(st, :lstm))
-    m = (; lstm, Wh = ps.lstm.weight_hh)
-    return GNNlib.set2set_pool(m, g, x)
-end
-
-(l::Set2Set)(g::GNNGraph) = GNNGraph(g, gdata = l(g, node_features(g), ps, st))