RealDataPresenter: some throw -> ASSERT

GUI/View/Import/RealDataPresenter.cpp

@@ -62,7 +62,6 @@ QStringList RealDataPresenter::activePresentationList() const
             result << "Reflectometry (Configuration)";
         result << "Reflectometry (Graph only)";
     } else
-        throw std::runtime_error(
-            "Error in RealDataPresenter::activePresentationList: unsupported data type");
+        ASSERT(false);
     return result;
 }