remove data_interpretations in step-68

an un-used variable data_interpretations in step-68 is removed

diff --git a/examples/step-68/step-68.cc b/examples/step-68/step-68.cc
index 67888ac0343e5b82d26cbe6df3aef2104462ccf8..1d0abc52b243cbae9bb6bc32c6c0cf1259289dab 100644 (file)
--- a/examples/step-68/step-68.cc
+++ b/examples/step-68/step-68.cc
@@ -632,8 +632,6 @@ namespace Step68
 
     std::vector<std::string> solution_names(dim, "velocity");
     solution_names.push_back("process_id");
-    std::vector<DataComponentInterpretation::DataComponentInterpretation>
-      data_interpretations;
 
     std::vector<DataComponentInterpretation::DataComponentInterpretation>
       data_component_interpretation(