diff --git a/swh/graph/dot.py b/swh/graph/dot.py
deleted file mode 100644
index 6a17150..0000000
--- a/swh/graph/dot.py
+++ /dev/null
@@ -1,68 +0,0 @@
-# Copyright (C) 2019  The Software Heritage developers
-# See the AUTHORS file at the top-level directory of this distribution
-# License: GNU General Public License version 3, or any later version
-# See top-level LICENSE file for more information
-
-import collections
-from functools import lru_cache
-import subprocess
-
-KIND_TO_SHAPE = {
-    "ori": "egg",
-    "snp": "doubleoctagon",
-    "rel": "octagon",
-    "rev": "diamond",
-    "dir": "folder",
-    "cnt": "oval",
-}
-
-
-@lru_cache()
-def dot_to_svg(dot):
-    try:
-        p = subprocess.run(
-            ["dot", "-Tsvg"],
-            input=dot,
-            universal_newlines=True,
-            capture_output=True,
-            check=True,
-        )
-    except subprocess.CalledProcessError as e:
-        raise RuntimeError(e.stderr) from e
-    return p.stdout
-
-
-def graph_dot(nodes):
-    ids = {n.id for n in nodes}
-
-    by_kind = collections.defaultdict(list)
-    for n in nodes:
-        by_kind[n.kind].append(n)
-
-    forward_edges = [
-        (node.id, child.id)
-        for node in nodes
-        for child in node.children()
-        if child.id in ids
-    ]
-    backward_edges = [
-        (parent.id, node.id)
-        for node in nodes
-        for parent in node.parents()
-        if parent.id in ids
-    ]
-    edges = set(forward_edges + backward_edges)
-    edges_fmt = "\n".join("{} -> {};".format(a, b) for a, b in edges)
-    nodes_fmt = "\n".join(node.dot_fragment() for node in nodes)
-
-    s = """digraph G {{
-    ranksep=1;
-    nodesep=0.5;
-
-    {nodes}
-    {edges}
-
-    }}""".format(
-        nodes=nodes_fmt, edges=edges_fmt
-    )
-    return s