remove undocumented method get() which used a char* instead of std::string

[[Imported from SVN: r4981]]

common/configparser.cc

@@ -191,13 +191,6 @@ string ConfigParser::get(const string& key, string defaultValue)
 }
 
 
-string ConfigParser::get(const string& key, char* defaultValue)
-{
-  string s = defaultValue;
-
-  return get(key, s);
-}
-
 int ConfigParser::get(const string& key, int defaultValue)
 {
   stringstream stream;

common/configparser.hh

@@ -148,9 +148,6 @@ namespace Dune {
     std::string get(const std::string& key, std::string defaultValue);
 
 
-    std::string get(const std::string& key, char* defaultValue);
-
-
     /** \brief get value as int
      *
      * Returns value for given key interpreted as int.