Remove TObject from the top of hierarchy, minor CMake tweaks

core/ChannelDetector.h

@@ -22,7 +22,7 @@ class ChannelDetector : public IndexedObject, protected IndexAccessor {
  public:
   ChannelDetector() = default;
   ChannelDetector(Int_t id) : IndexedObject(id) {}
-  ~ChannelDetector() override {
+  ~ChannelDetector() {
     // FIXME delete operator causes segfault,
     // as a solution for now ClearChannel() is called
     ClearChannels();
@@ -53,11 +53,8 @@ class ChannelDetector : public IndexedObject, protected IndexAccessor {
   /**
    * This function creates TClonesArray for channels and it is called
    * in ctor
-   *
-   * UPD: Calling virtual method in ctor is a very dangerous procedure
    */
   virtual void InitChannels() {
-    Fatal("InitChannels()", "InitChannels must be overwritten by user class");
   }
 
   void ClearChannels() {