pyproject: flip ty rules to error-by-default, review all new rules added since version bump

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

@@ -473,7 +473,6 @@ class ShapeBuilder:
         if arc_points and self.file.schema == "IFC2X3":
             raise Exception("Arcs are not supported for IFC2X3.")
 
-        points: np.ndarray
         points = np.array(points)
         if position_offset is not None:
             points = points + position_offset
@@ -635,7 +634,6 @@ class ShapeBuilder:
         diff = (0.01, 0.01) * diff_sign
         middle_point = points[0] + diff
 
-        points: list[VectorType]
         points = [points[0], middle_point, points[1]]
         points = [ifc_safe_vector_type(p) for p in points]
         seg = self.file.createIfcArcIndex((1, 2, 3))