diff --git a/product/ERP5/interfaces/target_solver.py b/product/ERP5/interfaces/target_solver.py
deleted file mode 100644
index eedc1c363335577e4a8fc8887418a978e34cdf04..0000000000000000000000000000000000000000
--- a/product/ERP5/interfaces/target_solver.py
+++ /dev/null
@@ -1,75 +0,0 @@
-# -*- coding: utf-8 -*-
-##############################################################################
-#
-# Copyright (c) 2009 Nexedi SARL and Contributors. All Rights Reserved.
-#                    Łukasz Nowak <luke@nexedi.com>
-#
-# WARNING: This program as such is intended to be used by professional
-# programmers who take the whole responsibility of assessing all potential
-# consequences resulting from its eventual inadequacies and bugs
-# End users who are looking for a ready-to-use solution with commercial
-# guarantees and support are strongly advised to contract a Free Software
-# Service Company
-#
-# This program is Free Software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program 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 General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-#
-##############################################################################
-
-from zope.interface import Interface
-
-class ITargetSolver(Interface):
-  """Target Solver interface specification
-
-  This interface must be implemented by all target solvers
-  which are used to solve divergences in ERP5 simulation. Documents
-  which implemet ITargetSolver provide a solve method.
-
-  Besides ITargetSolver static interface definition, target solvers
-  must support IDeliveryGetter to access simulation movements to solve.
-
-  TODO-XXX: 
-    - find a way to make static interfaces inherit from
-      dynamic interfaces in ERP5 (ex. solver process workflow)
-    - IDeliveryGetter is not appropriate name / interface
-    - find a way to define at which level to solve divergences
-      (ex. line, delivery)
-  """
-  def solve():
-    """
-    Start the solving process (and trigger the workflow method
-    in solver_process_workflow). At the end the solving process,
-    appropriate methods of the solver_process_workflow must be invoked
-    (ex. succeed, fail, abort).
-    """
-
-  def isSolving():
-    """
-    Returns True if the solver processing in ongoing. False else.
-    """
-
-  def isSolved():
-    """
-    Returns True if all divergences are solved, False else.
-    """
-
-  def isFailed():
-    """
-    Returns True if divergence resolution fails. False else.
-    """
-
-  def isAborted():
-    """
-    Returns True if divergence resolution was aborted. False else.
-    """
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