rm EICLegacyDataSvc: not available in latest k4FWCore

https://github.com/key4hep/k4FWCore/commit/2fba18c46c9ac2d6f76365c27c61d770a7ac90bb

JugBase/src/components/EICLegacyDataSvc.cpp

-// SPDX-License-Identifier: LGPL-3.0-or-later
-// Copyright (C) 2023 Benedikt Hegner
-
-#ifndef JUGBASE_EICLEGACYDATASVC_H
-#define JUGBASE_EICLEGACYDATASVC_H
-
-#include <k4FWCore/PodioLegacyDataSvc.h>
-
-class EICLegacyDataSvc : public PodioLegacyDataSvc {
-public:
-  /// Standard Constructor
-  EICLegacyDataSvc(const std::string& name, ISvcLocator* svc);
-
-  /// Standard Destructor
-  virtual ~EICLegacyDataSvc();
-};
-#endif  // JUGBASE_EICLEGACYDATASVC_H