removed convert_string_to_set() function declaration

src/utils.hpp

@@ -3,19 +3,3 @@
 
 // trim string in-place, removing all whitespaces and surrounding '"' symbols
 void trim(std::string &str);
-
-// Convert a string containing an inline YAML/JSON-style list of strings
-// into a std::set<std::string>.
-//
-// Supported format (single line):
-//   ["haha", "dupa", "xdd"]
-//
-// Limitations:
-// - no nested structures
-// - no escaping inside strings
-// - elements must be quoted
-//
-// Example:
-//   Input:  ["haha", "dupa", "xdd"]
-//   Output: {"dupa", "haha", "xdd"}   // sorted, unique
-std::set<std::string> convert_string_to_set(std::string input);