Don't rely on util for basic ifcopenshell module capabilities. Keep util as an optional module for users to load.

src/ifcopenshell-python/ifcopenshell/util/file.py

@@ -1,29 +0,0 @@
-# IfcOpenShell - IFC toolkit and geometry engine
-# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
-#
-# This file is part of IfcOpenShell.
-#
-# IfcOpenShell is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# IfcOpenShell is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
-
-from pathlib import Path
-
-
-def guess_format(path: Path) -> "str | None":
-    """Try to guess format using file extension"""
-    if path.suffix.lower() in (".ifczip", ".zip"):
-        return ".ifcZIP"
-    elif path.suffix.lower() in (".ifcxml", ".xml"):
-        return ".ifcXML"
-    elif path.suffix.lower() in (".ifcsqlite", ".sqlite", ".db"):
-        return ".ifcSQLite"