Remove leftovers

python/dune/perftool/loopy/transformer.py

@@ -8,11 +8,6 @@ from __future__ import absolute_import
 from dune.perftool import Restriction
 from dune.perftool.ufl.modified_terminals import ModifiedTerminalTracker
 from dune.perftool.pymbolic.uflmapper import UFL2PymbolicMapper
-from dune.perftool.pymbolic.placeholder import (IndexPlaceholder,
-                                                IndexPlaceholderRemoval,
-                                                LFSIndexPlaceholder,
-                                                LFSIndexPlaceholderExtraction,
-                                                )
 from dune.perftool.pdelab.geometry import GeometryMapper
 from dune.perftool.generation import (domain,
                                       get_temporary_name,