Remove unused function from mapillary/opensfm/opensfm/src/third_party…

…/akaze/lib/utils.cpp

Summary: `-Wunused-function` has identified an unused function. This diff removes it. In many cases these functions have existed for years in an unused state.

Reviewed By: dmm-fb

Differential Revision: D59644696

fbshipit-source-id: 1e7f68d125820c9a969db26df91e0fe269fbddd5

opensfm/src/third_party/akaze/lib/utils.cpp

@@ -392,12 +392,6 @@ static inline std::ostream& cout_help() {
   return cout;
 }
 
-/* ************************************************************************* */
-static inline std::string toUpper(std::string s) {
-  std::transform(s.begin(), s.end(), s.begin(), ::toupper);
-  return s;
-}
-
 /* ************************************************************************* */
 void show_input_options_help(int example) {