From b28023d9f766b4a2b0144ffe661d56f61b038dfb Mon Sep 17 00:00:00 2001
From: "Christian Y. Brenninkmeijer"
 <christian.brenninkmeijer@manchester.ac.uk>
Date: Wed, 15 Apr 2026 08:02:09 +0100
Subject: [PATCH] remove unneeded SpYNNakerConnectionHolderGenerator

---
 spynnaker/pyNN/extra_algorithms/__init__.py   |  3 -
 ...spynnaker_connection_holder_generations.py | 68 -------------------
 2 files changed, 71 deletions(-)
 delete mode 100644 spynnaker/pyNN/extra_algorithms/spynnaker_connection_holder_generations.py

diff --git a/spynnaker/pyNN/extra_algorithms/__init__.py b/spynnaker/pyNN/extra_algorithms/__init__.py
index 9ccf42e6434..4c94ce9a7ba 100644
--- a/spynnaker/pyNN/extra_algorithms/__init__.py
+++ b/spynnaker/pyNN/extra_algorithms/__init__.py
@@ -13,8 +13,6 @@
 # limitations under the License.
 from .connection_holder_finisher import finish_connection_holders
 from .redundant_packet_count_report import redundant_packet_count_report
-from .spynnaker_connection_holder_generations import (
-    SpYNNakerConnectionHolderGenerator)
 from .spynnaker_neuron_network_specification_report import (
     spynnaker_neuron_graph_network_specification_report)
 from .spynnaker_synaptic_matrix_report import SpYNNakerSynapticMatrixReport
@@ -26,7 +24,6 @@
     "delay_support_adder",
     "finish_connection_holders",
     "redundant_packet_count_report",
-    "SpYNNakerConnectionHolderGenerator",
     "spynnaker_neuron_graph_network_specification_report",
     "SpYNNakerSynapticMatrixReport",
     "synapse_expander", "neuron_expander"]
diff --git a/spynnaker/pyNN/extra_algorithms/spynnaker_connection_holder_generations.py b/spynnaker/pyNN/extra_algorithms/spynnaker_connection_holder_generations.py
deleted file mode 100644
index 450ecd6126e..00000000000
--- a/spynnaker/pyNN/extra_algorithms/spynnaker_connection_holder_generations.py
+++ /dev/null
@@ -1,68 +0,0 @@
-# Copyright (c) 2016 The University of Manchester
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-from typing import Dict, Mapping, Tuple
-from spinn_utilities.progress_bar import ProgressBar
-from pacman.model.graphs.application import ApplicationGraph
-from spynnaker.pyNN.models.neuron import ConnectionHolder
-from spynnaker.pyNN.models.neural_projections import (
-    ProjectionApplicationEdge, SynapseInformation)
-
-
-class SpYNNakerConnectionHolderGenerator(object):
-    """
-    Sets up connection holders for reports to use.
-    """
-
-    def __call__(self, application_graph: ApplicationGraph) -> Mapping[
-            Tuple[ProjectionApplicationEdge, SynapseInformation],
-            ConnectionHolder]:
-        """
-        :param application_graph: application graph
-        :return:
-            the set of connection holders for after data specification
-            generation
-        """
-        progress = ProgressBar(
-            application_graph.n_outgoing_edge_partitions,
-            "Generating connection holders for reporting connection data.")
-
-        data_holders: Dict[
-            Tuple[ProjectionApplicationEdge, SynapseInformation],
-            ConnectionHolder] = dict()
-        for partition in progress.over(
-                application_graph.outgoing_edge_partitions):
-            for edge in partition.edges:
-                # add pre run generators so that reports can extract without
-                # going to machine.
-                if isinstance(edge, ProjectionApplicationEdge):
-                    # build connection holders
-                    self._generate_holder_for_edge(edge, data_holders)
-
-        # return the two holders
-        return data_holders
-
-    @staticmethod
-    def _generate_holder_for_edge(
-            edge: ProjectionApplicationEdge, data_holders: Dict[
-                Tuple[ProjectionApplicationEdge, SynapseInformation],
-                ConnectionHolder]) -> None:
-        # build connection holders
-        connection_holder = ConnectionHolder(
-            None, True, edge.pre_vertex.n_atoms, edge.post_vertex.n_atoms)
-
-        for synapse_information in edge.synapse_information:
-            synapse_information.add_pre_run_connection_holder(
-                connection_holder)
-            # store for the report generations
-            data_holders[edge, synapse_information] = connection_holder