delete useless code

main.cpp

@@ -2,7 +2,6 @@
 #include <filesystem>
 #include <vector>
 #include <string>
-#include <iostream>
 
 #define   K_VISION_DIR   "/hard/k_vision"
 #define   AI_VISION_DIR  "/hard/ai_vision"
@@ -47,7 +46,7 @@ std::vector<std::string> get_file_paths(const std::string& strDir)
     return vs;
 }
 
-std::vector<std::string> get_search_paths(const std::string& strFileName, int nBeginTime = 8, int nEndTime = 12)
+std::vector<std::string> get_search_paths(const std::string& strFileName, int nBeginTime, int nEndTime)
 {
     std::vector<std::string> vs;
     if (strFileName.empty())