remove Trd2d from the list of default loaded detectors in BuildRawEvents

since it may not be present for some geometrical setups. The task is
delegated to the steering macro

reco/eventbuilder/digis/CbmAlgoBuildRawEvents.h

@@ -260,7 +260,6 @@ private:
     RawEventBuilderDetector(ECbmModuleId::kSts, ECbmDataType::kStsDigi, "kSts"),
     RawEventBuilderDetector(ECbmModuleId::kMuch, ECbmDataType::kMuchDigi, "kMuch"),
     RawEventBuilderDetector(ECbmModuleId::kTrd, ECbmDataType::kTrdDigi, "kTrd"),
-    RawEventBuilderDetector(ECbmModuleId::kTrd2d, ECbmDataType::kTrd2dDigi, "kTrd2d"),
     RawEventBuilderDetector(ECbmModuleId::kTof, ECbmDataType::kTofDigi, "kTof"),
     RawEventBuilderDetector(ECbmModuleId::kRich, ECbmDataType::kRichDigi, "kRich"),
     RawEventBuilderDetector(ECbmModuleId::kPsd, ECbmDataType::kPsdDigi, "kPsd")};

reco/eventbuilder/digis/CbmTaskBuildRawEvents.cxx

@@ -131,12 +131,11 @@ InitStatus CbmTaskBuildRawEvents::Init()
     fpAlgo->SetTrdDigis(fTrdDigis);
   }
 
-  //Trd2d not included (yet) in digi manager.
-  fTrd2dDigis =
-    const_cast<std::vector<CbmTrdDigi>*>(ioman->InitObjectAs<std::vector<CbmTrdDigi> const*>("TrdFaspDigi"));
-  if (!fTrd2dDigis) { LOG(info) << "No Trd2d digi input."; }
+  //Init TRD digis
+  if (!fDigiMan->IsPresent(ECbmModuleId::kTrd2d)) { LOG(info) << "No TRD-2D digi input."; }
   else {
-    LOG(info) << "TRD2D digi input.";
+    LOG(info) << "TRD-2D digi input.";
+    fTrd2dDigis = new std::vector<CbmTrdDigi>;
     fpAlgo->SetTrd2dDigis(fTrd2dDigis);
   }