PixelConditionsAlgorithms: Clean up conditions dependencies.

Don't declare a conditions dependency that we won't use.

InnerDetector/InDetConditions/PixelConditionsAlgorithms/src/PixeldEdxAlg.cxx

 /*
-  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
 #include "PixeldEdxAlg.h"
@@ -22,7 +22,7 @@ StatusCode PixeldEdxAlg::initialize() {
 
   ATH_CHECK(m_condSvc.retrieve());
 
-  ATH_CHECK(m_readKey.initialize());
+  ATH_CHECK(m_readKey.initialize(m_readfromcool));
   ATH_CHECK(m_writeKey.initialize());
   if (m_readfromcool) {
     if (m_condSvc->regHandle(this,m_writeKey).isFailure()) {