Remove forgotten config in MK2_minirambo_1.0a

Firmware/variants/obsolete/1_75mm_MK2-RAMBo10a-E3Dv6full.h

@@ -300,45 +300,32 @@ BED SETTINGS
 PREHEAT SETTINGS
 *------------------------------------*/
 
-#define FARM_PREHEAT_HOTEND_TEMP 250
-#define FARM_PREHEAT_HPB_TEMP 80
-#define FARM_PREHEAT_FAN_SPEED 0
-
 #define PLA_PREHEAT_HOTEND_TEMP 215
 #define PLA_PREHEAT_HPB_TEMP 55
-#define PLA_PREHEAT_FAN_SPEED 0
 
 #define PVB_PREHEAT_HOTEND_TEMP 215
 #define PVB_PREHEAT_HPB_TEMP 75
-#define PVB_PREHEAT_FAN_SPEED 0
 
 #define ASA_PREHEAT_HOTEND_TEMP 260
 #define ASA_PREHEAT_HPB_TEMP 105
-#define ASA_PREHEAT_FAN_SPEED 0
 
 #define PC_PREHEAT_HOTEND_TEMP 275
 #define PC_PREHEAT_HPB_TEMP 105
-#define PC_PREHEAT_FAN_SPEED 0
 
 #define ABS_PREHEAT_HOTEND_TEMP 255
 #define ABS_PREHEAT_HPB_TEMP 100
-#define ABS_PREHEAT_FAN_SPEED 0 
 
 #define HIPS_PREHEAT_HOTEND_TEMP 220
 #define HIPS_PREHEAT_HPB_TEMP 100
-#define HIPS_PREHEAT_FAN_SPEED 0 
 
 #define PP_PREHEAT_HOTEND_TEMP 254
 #define PP_PREHEAT_HPB_TEMP 100
-#define PP_PREHEAT_FAN_SPEED 0 
 
 #define PET_PREHEAT_HOTEND_TEMP 240
 #define PET_PREHEAT_HPB_TEMP 90
-#define PET_PREHEAT_FAN_SPEED 0 
 
 #define FLEX_PREHEAT_HOTEND_TEMP 230
 #define FLEX_PREHEAT_HPB_TEMP 50
-#define FLEX_PREHEAT_FAN_SPEED 0 
 
 /*------------------------------------
 THERMISTORS SETTINGS