diff --git a/tools/dev/generate_pyi_files.py b/tools/dev/generate_pyi_files.py
deleted file mode 100644
index c6ae36e7dd4..00000000000
--- a/tools/dev/generate_pyi_files.py
+++ /dev/null
@@ -1,81 +0,0 @@
-# Authors: The MNE-Python contributors.
-# License: BSD-3-Clause
-# Copyright the MNE-Python contributors.
-
-import os
-import sys
-from importlib import import_module
-from pathlib import Path
-
-import ast_comments as ast
-import black
-
-import mne
-
-
-class RewriteAssign(ast.NodeTransformer):
-    """NodeTransformer to replace lazy attach with attach_stub."""
-
-    def visit_Assign(self, node):
-        """Replace lazy attach assignment with stub assignment."""
-        if not hasattr(node.targets[0], "dims"):
-            return node
-
-        ids = [name.id for name in node.targets[0].dims]
-        if ids == ["__getattr__", "__dir__", "__all__"]:
-            return ast.parse(
-                "__getattr__, __dir__, __all__ = lazy.attach_stub(__name__, __file__)\n"
-            )
-        return node
-
-
-pyi_mode = black.Mode(is_pyi=True)
-root = Path(mne.__file__).parent
-inits = root.rglob("__init__.py")
-
-for init in inits:
-    # skip init files that don't lazy load (e.g., tests)
-    code = init.read_text("utf-8")
-    if "import lazy_loader as lazy" not in code:
-        continue
-    # get the AST
-    tree = ast.parse(code)
-    nodes = [node for node in tree.body if isinstance(node, ast.Assign)]
-    assert len(nodes) == 1
-    node = nodes[0]
-    keywords = node.value.keywords
-    # get submodules
-    import_lines = list()
-    assert keywords[0].arg == "submodules"
-    # for submod in keywords[0].value.elts:
-    #     import_lines.append(f"import {submod.value}")
-    submods = [submod.value for submod in keywords[0].value.elts]
-    if len(submods):
-        import_lines.append(f"from . import {', '.join(submods)}")
-    # get attrs
-    assert keywords[1].arg == "submod_attrs"
-    _dict = keywords[1].value
-    for key, vals in zip(_dict.keys, _dict.values):
-        attrs = [attr.value for attr in vals.elts]
-        import_lines.append(f"from .{key.value} import {', '.join(attrs)}")
-    # format
-    import_lines = black.format_str("\n".join(import_lines), mode=pyi_mode)
-    # get __all__
-    import_path = str(init.parent.relative_to(root.parent)).replace(os.sep, ".")
-    import_module(import_path)
-    _all = black.format_str(
-        f"__all__ = {repr(sys.modules[import_path].__all__)}\n",
-        mode=pyi_mode,
-    )
-    # write __init__.pyi
-    outfile = init.with_suffix(".pyi")
-    with open(outfile, "w") as fid:
-        fid.write(_all)
-        fid.write(import_lines)
-    # rewrite __init__.py
-    new_tree = RewriteAssign().visit(tree)
-    new_tree = ast.fix_missing_locations(new_tree)
-    new_code = ast.unparse(new_tree)
-    formatted_code = black.format_str(new_code, mode=black.Mode())
-    with open(init, "w") as fid:
-        fid.write(formatted_code)