Remove debugging output

Author: franzpoeschel

test/SerialIOTest.cpp

@@ -6506,30 +6506,21 @@ TEST_CASE("append_mode", "[serial]")
         }
     }
 })END";
-            std::cout << "Append mode ADIOS2 group-based old schema."
-                      << std::endl;
             append_mode(
                 "../samples/append_groupbased." + t, false, jsonConfigOld);
-            std::cout << "Append mode ADIOS2 group-based new schema."
-                      << std::endl;
             append_mode(
                 "../samples/append_variablebased." + t, false, jsonConfigNew);
-            std::cout << "Append mode ADIOS2 variable-based old schema."
-                      << std::endl;
             append_mode(
                 "../samples/append_groupbased_newschema." + t,
                 true,
                 jsonConfigOld);
-            std::cout << "Append mode ADIOS2 variable-based new schema."
-                      << std::endl;
             append_mode(
                 "../samples/append_variablebased_newschema." + t,
                 true,
                 jsonConfigNew);
         }
         else
         {
-            std::cout << "Append mode ending '" << t << "'" << std::endl;
             append_mode("../samples/append_groupbased." + t, false);
         }
     }