take out the initial_eta_profile parameter

Author: chunshen1987

src/read_in_parameters.cpp

@@ -1049,15 +1049,6 @@ void check_parameters(InitData &parameter_list, std::string input_file) {
         exit(1);
     }
 
-    if (parameter_list.initial_eta_profile > 2
-            || parameter_list.initial_eta_profile < 0) {
-        music_message << "Initial eta profile"
-                      << parameter_list.initial_eta_profile
-                      << "not defined";
-        music_message.flush("error");
-        exit(1);
-    }
-
     if (parameter_list.initializeEntropy > 1
             || parameter_list.initializeEntropy < 0) {
         music_message.error("Must initialize with entropy or energy");