BTT GTR has I2C EEPROM (#18029)

Marlin/src/pins/stm32f4/pins_BTT_GTR_V1_0.h

@@ -31,18 +31,10 @@
 
 #define BOARD_INFO_NAME "BIGTREE GTR 1.0"
 
-// Use one of these or SDCard-based Emulation will be used
-#if NO_EEPROM_SELECTED
-  //#define I2C_EEPROM
-  //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
-  //#define FLASH_EEPROM_EMULATION                // Use Flash-based EEPROM emulation
-#endif
-
-#if ENABLED(FLASH_EEPROM_EMULATION)
-  // Decrease delays and flash wear by spreading writes across the
-  // 128 kB sector allocated for EEPROM emulation.
-  #define FLASH_EEPROM_LEVELING
-#endif
+// Onboard I2C EEPROM
+#define I2C_EEPROM
+#undef E2END
+#define E2END 0x1FFF // EEPROM end address 24C64 (64Kb = 8KB)
 
 #define TP                                        // Enable to define servo and probe pins