refactor: Remove unused firmware-specific model file checks to simplify DynamixelInfo class

Author: Woojin-Crive

include/dynamixel_hardware_interface/dynamixel/dynamixel_info.hpp

@@ -66,11 +66,7 @@ class DynamixelInfo
   std::string SelectModelFileByFirmwareVersion(
     const std::string & base_model_name,
     uint8_t firmware_version);
-  bool IsFirmwareSpecificModelFile(const std::string & filename);
   uint8_t ExtractFirmwareVersionFromFilename(const std::string & filename);
-  bool ShouldUseFirmwareSpecificModel(
-    uint8_t device_firmware_version,
-    uint8_t model_firmware_version);
 
 public:
   // Id, Control table

src/dynamixel/dynamixel_info.cpp

@@ -306,12 +306,6 @@ std::string DynamixelInfo::SelectModelFileByFirmwareVersion(
   return selected_file;
 }
 
-bool DynamixelInfo::IsFirmwareSpecificModelFile(const std::string & filename)
-{
-  std::regex fw_pattern(R"(_fw\d+\.model$)");
-  return std::regex_search(filename, fw_pattern);
-}
-
 uint8_t DynamixelInfo::ExtractFirmwareVersionFromFilename(const std::string & filename)
 {
   std::regex fw_pattern(R"(_fw(\d+)\.model$)");
@@ -324,15 +318,6 @@ uint8_t DynamixelInfo::ExtractFirmwareVersionFromFilename(const std::string & fi
   return 0;  // Return 0 if no firmware version found
 }
 
-bool DynamixelInfo::ShouldUseFirmwareSpecificModel(
-  uint8_t device_firmware_version,
-  uint8_t model_firmware_version)
-{
-  // Use firmware-specific model if device firmware version is <= model firmware version
-  // This ensures backward compatibility
-  return device_firmware_version <= model_firmware_version;
-}
-
 bool DynamixelInfo::GetDxlControlItem(
   uint8_t id, std::string item_name, uint16_t & addr,
   uint8_t & size)