remove default constructor + fix compilation of digit and vector<digit>

Author: maciacco

Detectors/Upgrades/ALICE3/IOTOF/DataFormatsIOTOF/include/DataFormatsIOTOF/Digit.h

@@ -26,7 +26,6 @@ namespace o2::iotof
 class Digit : public o2::itsmft::Digit
 {
  public:
-  Digit() = default;
   ~Digit() = default;
   Digit(UShort_t chipindex = 0, UShort_t row = 0, UShort_t col = 0, Int_t charge = 0, double time = 0.)
     : o2::itsmft::Digit(chipindex, row, col, charge), mTime(time) {};

Detectors/Upgrades/ALICE3/IOTOF/DataFormatsIOTOF/src/DataFormatsIOTOFLinkDef.h

@@ -16,5 +16,6 @@
 #pragma link off all functions;
 
 #pragma link C++ class o2::iotof::Digit + ;
-// #pragma link C++ class std::vector < o2::iotof::Digit> + ;
+#pragma link C++ class std::vector < o2::iotof::Digit> + ;
+
 #endif