diff --git a/PhysicsAnalysis/AnalysisCommon/PATInterfaces/PATInterfaces/IObservableTool.h b/PhysicsAnalysis/AnalysisCommon/PATInterfaces/PATInterfaces/IObservableTool.h
deleted file mode 100644
index c4c40ac9a57377d7a610f59b7da3a0d8c62ea2c7..0000000000000000000000000000000000000000
--- a/PhysicsAnalysis/AnalysisCommon/PATInterfaces/PATInterfaces/IObservableTool.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// Dear emacs, this is -*- c++ -*-
-// $Id: IObservableTool.h $
-#ifndef PATINTERFACES_IOBSERVABLETOOL_H
-#define PATINTERFACES_IOBSERVABLETOOL_H
-
-// System include(s):
-
-// Framework include(s):
-#include "AsgTools/IAsgTool.h"
-
-// Forward declaration
-namespace xAOD{
-  class IParticle;
-}
-
-
-/// Interface for tools that want to calculate a quantity
-/// from an xAOD::IParticle
-/// @author Karsten Koeneke <karsten.koeneke@cern.ch>
-///
-class IObservableTool : public virtual asg::IAsgTool {
-
-  /// Declare the interface that this class provides
-  ASG_TOOL_INTERFACE( IObservableTool )
-
- public:
-
-  /// Virtual destructor
-  virtual ~IObservableTool(){};
-
-  /// returns: the value that was calculated from the xAOD::IParticle
-  virtual double
-  evaluate( const xAOD::IParticle* ) const = 0;
-
- }; // class IObservableTool
-
-
-#endif // PATINTERFACES_IOBSERVABLETOOL_H