Remove unused kicktime timer

The variable is only set and never actually used

Saves 8 bytes of flash and 4  bytes of SRAM

Firmware/Marlin.h

@@ -320,9 +320,6 @@ extern bool is_usb_printing;
 extern bool homing_flag;
 extern bool loading_flag;
 extern unsigned int usb_printing_counter;
-
-extern unsigned long kicktime;
-
 extern unsigned long total_filament_used;
 void save_statistics(unsigned long _total_filament_used, unsigned long _total_print_time);
 extern unsigned int heating_status;

Firmware/Marlin_main.cpp

@@ -195,8 +195,6 @@ int bowden_length[4] = {385, 385, 385, 385};
 bool is_usb_printing = false;
 bool homing_flag = false;
 
-unsigned long kicktime = _millis()+100000;
-
 unsigned int  usb_printing_counter;
 
 int8_t lcd_change_fil_state = 0;
@@ -4601,8 +4599,6 @@ void process_commands()
       eeprom_update_word(reinterpret_cast<uint16_t *>(&(EEPROM_Sheets_base->s[(eeprom_read_byte(&(EEPROM_Sheets_base->active_sheet)))].z_offset)),0);
 
 	} else if(code_seen_P(PSTR("Beat"))) { // PRUSA Beat
-        // Kick farm link timer
-        kicktime = _millis();
 
     } else if(code_seen_P(PSTR("FR"))) { // PRUSA FR
         // Factory full reset