Remove the word "interior" from cell not found message

apps/openmw/mwworld/store.cpp

@@ -592,7 +592,7 @@ namespace MWWorld
         const ESM::Cell *ptr = search(id);
         if (ptr == 0) {
             std::ostringstream msg;
-            msg << "Interior cell '" << id << "' not found";
+            msg << "Cell '" << id << "' not found";
             throw std::runtime_error(msg.str());
         }
         return ptr;