Cleanup unused anycubic related code

Marlin/src/lcd/HardwareSerial.cpp

@@ -312,33 +312,6 @@ HardwareSerialClass::operator bool()
 HardwareSerialClass HardwareSerial(&rx_buffer_ajg, &tx_buffer_ajg, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3, RXEN3, TXEN3, RXCIE3, UDRIE3, U2X3);
 #endif
 
-void Newok_to_send() {
-  previous_cmd_ms = millis();
-  /*
-  if (!send_ok[cmd_queue_index_r]) return;
- // SERIAL_PROTOCOLPGM(MSG_OK);
-  #if ENABLED(ADVANCED_OK)
-    char* p = command_queue[cmd_queue_index_r];
-    if (*p == 'N') {
-      SERIAL_PROTOCOL(' ');
-      SERIAL_ECHO(*p++);
-      while (NUMERIC_SIGNED(*p))
-        SERIAL_ECHO(*p++);
-    }
-    SERIAL_PROTOCOLPGM(" P"); SERIAL_PROTOCOL(int(BLOCK_BUFFER_SIZE - planner.movesplanned() - 1));
-    SERIAL_PROTOCOLPGM(" B"); SERIAL_PROTOCOL(BUFSIZE - commands_in_queue);
-  #endif
-  SERIAL_EOL;
-  */
-}
-void NEWFlushSerialRequestResend() {
-  //char command_queue[cmd_queue_index_r][100]="Resend:";
-  HardwareSerial.flush();
- // SERIAL_PROTOCOLPGM(MSG_RESEND);
-//  SERIAL_PROTOCOLLN(gcode_LastN + 1);
-  Newok_to_send();
-}
-
 #endif
 
 #endif // whole file

Marlin/src/lcd/HardwareSerial.h

@@ -141,7 +141,4 @@ FORCE_INLINE void HardwareSerialprintPGM(const char *str)
   }
 }
 
-void NEWFlushSerialRequestResend();
-void NEWClearToSend();
-
 #endif

Marlin/src/lcd/anycubic_touchscreen.cpp

@@ -1076,10 +1076,7 @@ void AnycubicTouchscreenClass::GetCommandFromTFT()
           if( (int)(strtod(&TFTcmdbuffer[TFTbufindw][TFTstrchr_pointer - TFTcmdbuffer[TFTbufindw] + 1], NULL)) != checksum)
           {
               HARDWARE_SERIAL_ERROR_START;
-              NEWFlushSerialRequestResend();
+              HardwareSerial.flush();
-
-              HARDWARE_SERIAL_ERROR_START;
-              NEWFlushSerialRequestResend();
               serial3_count = 0;
               return;
           }
@@ -1088,7 +1085,7 @@ void AnycubicTouchscreenClass::GetCommandFromTFT()
        else
        {
          HARDWARE_SERIAL_ERROR_START;
-         NEWFlushSerialRequestResend();
+         HardwareSerial.flush();
          serial3_count = 0;
          return;
        }