style: remove unused params of main (#2948)

Co-authored-by: realstealthninja <68815218+realstealthninja@users.noreply.github.com>

machine_learning/k_nearest_neighbors.cpp

@@ -186,11 +186,9 @@ static void test() {
 
 /**
  * @brief Main function
- * @param argc commandline argument count (ignored)
- * @param argv commandline array of arguments (ignored)
  * @return int 0 on exit
  */
-int main(int argc, char* argv[]) {
+int main() {
     test();  // run self-test implementations
     return 0;
 }

machine_learning/kohonen_som_topology.cpp

@@ -579,7 +579,7 @@ double get_clock_diff(clock_t start_t, clock_t end_t) {
 }
 
 /** Main function */
-int main(int argc, char **argv) {
+int main() {
 #ifdef _OPENMP
     std::cout << "Using OpenMP based parallelization\n";
 #else

machine_learning/kohonen_som_trace.cpp

@@ -454,7 +454,7 @@ double get_clock_diff(clock_t start_t, clock_t end_t) {
 }
 
 /** Main function */
-int main(int argc, char **argv) {
+int main() {
 #ifdef _OPENMP
     std::cout << "Using OpenMP based parallelization\n";
 #else