diff --git a/EmulatorPkg/Library/DxeEmuSerialPortLib/DxeEmuSerialPortLib.c b/EmulatorPkg/Library/DxeEmuSerialPortLib/DxeEmuSerialPortLib.c
index 2efb8400fa..792bd62a1c 100644
--- a/EmulatorPkg/Library/DxeEmuSerialPortLib/DxeEmuSerialPortLib.c
+++ b/EmulatorPkg/Library/DxeEmuSerialPortLib/DxeEmuSerialPortLib.c
@@ -17,7 +17,6 @@
 
 #include <PiDxe.h>
 #include <Library/SerialPortLib.h>
-#include <Library/SerialPortExtLib.h>
 #include <Library/EmuThunkLib.h>
 
 
@@ -117,57 +116,3 @@ SerialPortPoll (
   return gEmuThunk->PollStdIn ();
 }
 
-/**
-  Set the serial device control bits.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetControl (
-  IN UINT32                   Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-/**
-  Get the serial device control bits.
-
-  @param  Control                 Control signals read from the serial device.
-
-  @retval EFI_SUCCESS             The control bits were read from the serial device.
-  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortGetControl (
-  OUT UINT32                  *Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-
-/**
-  Set the serial device attributes.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetAttributes (
-  IN UINT64              BaudRate,
-  IN UINT32              ReceiveFifoDepth,
-  IN UINT32              Timeout,
-  IN EFI_PARITY_TYPE     Parity,
-  IN UINT8               DataBits,
-  IN EFI_STOP_BITS_TYPE  StopBits
-  )
-{
-  return RETURN_SUCCESS;
-}
-
diff --git a/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c b/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c
index 3b74a0c325..b3a20a9811 100644
--- a/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c
+++ b/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c
@@ -18,7 +18,6 @@
 
 #include <PiPei.h>
 #include <Library/SerialPortLib.h>
-#include <Library/SerialPortExtLib.h>
 #include <Library/PeiServicesLib.h>
 
 #include <Ppi/EmuThunk.h>
@@ -138,58 +137,3 @@ SerialPortPoll (
   return FALSE;
 }
 
-/**
-  Set the serial device control bits.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetControl (
-  IN UINT32                   Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-/**
-  Get the serial device control bits.
-
-  @param  Control                 Control signals read from the serial device.
-
-  @retval EFI_SUCCESS             The control bits were read from the serial device.
-  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortGetControl (
-  OUT UINT32                  *Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-
-/**
-  Set the serial device attributes.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetAttributes (
-  IN UINT64              BaudRate,
-  IN UINT32              ReceiveFifoDepth,
-  IN UINT32              Timeout,
-  IN EFI_PARITY_TYPE     Parity,
-  IN UINT8               DataBits,
-  IN EFI_STOP_BITS_TYPE  StopBits
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-