[base] Fix 1522

Information on reactions in the phase input section is kept in
user data, but cannot be used for the serialization, as there
is no bookkeeping of where reactions originated. As it is not
essential to retain this information, the user input is deleted.

src/base/Solution.cpp

@@ -118,6 +118,10 @@ AnyMap Solution::parameters(bool withInput) const
     if (withInput) {
         auto transport = out["transport"];
         AnyMap input = m_thermo->input();
+        if (input.hasKey("reactions")) {
+            // all reactions are listed in the standard 'reactions' section
+            input.erase("reactions");
+        }
         out.update(input);
         if (input.hasKey("transport")) {
             // revert changes / ensure that correct model is referenced