SD2Card cleanup (#14571)

Marlin/src/sd/Sd2Card.cpp

  * \return true for success, false for failure.
  * The reason for failure can be determined by calling errorCode() and errorData().
  */
-bool Sd2Card::init(const uint8_t sckRateID/*=0*/, const pin_t chipSelectPin/*=SD_CHIP_SELECT_PIN*/) {
+bool Sd2Card::init(const uint8_t sckRateID, const pin_t chipSelectPin) {
   errorCode_ = type_ = 0;
   chipSelectPin_ = chipSelectPin;
   // 16-bit init start time allows over a minute

Marlin/src/sd/Sd2Card.h

 #elif USE_SOFTWARE_SPI
   #define SOFTWARE_SPI
 #endif  // MEGA_SOFT_SPI
-//------------------------------------------------------------------------------
-// SPI pin definitions - do not edit here - change in SdFatConfig.h
-//
-#define SD_CHIP_SELECT_PIN SS_PIN
 
 /**
  * \class Sd2Card
    *
    * \return true for success or false for failure.
    */
-  bool init(const uint8_t sckRateID=SPI_FULL_SPEED, const pin_t chipSelectPin=SD_CHIP_SELECT_PIN);
+  bool init(const uint8_t sckRateID, const pin_t chipSelectPin);
 
   bool readBlock(uint32_t block, uint8_t* dst);