Deletes a file.
bool DeleteFile(const char path, bool use_valve_fs, const char valve_path_id)
Path of the file to delete.
If true, the Valve file system will be used instead. This can be used to delete files existing in the Valve search path, rather than solely files existing directly in the gamedir.
If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths.
True on success, false on failure or if file not immediately removed.