diff --git a/BaseTools/Source/Python/Common/FdfParserLite.py b/BaseTools/Source/Python/Common/FdfParserLite.py
index 0e35eb484b..692e8aeb3f 100644
--- a/BaseTools/Source/Python/Common/FdfParserLite.py
+++ b/BaseTools/Source/Python/Common/FdfParserLite.py
@@ -184,21 +184,6 @@ class FdfParser(object):
         
         self.__WipeOffArea = []
 
-    ## __IsWhiteSpace() method
-    #
-    #   Whether char at current FileBufferPos is whitespace
-    #
-    #   @param  self        The object pointer
-    #   @param  Char        The char to test
-    #   @retval True        The char is a kind of white space
-    #   @retval False       The char is NOT a kind of white space
-    #
-    def __IsWhiteSpace(self, Char):
-        if Char in (T_CHAR_NULL, T_CHAR_CR, T_CHAR_SPACE, T_CHAR_TAB, T_CHAR_LF):
-            return True
-        else:
-            return False
-
     ## __SkipWhiteSpace() method
     #
     #   Skip white spaces from current char, return number of chars skipped
diff --git a/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py b/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
index fbe0c41b38..053f1b22eb 100644
--- a/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
+++ b/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
@@ -1,7 +1,7 @@
 ## @file
 # preprocess source file
 #
-#  Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -75,21 +75,6 @@ class CodeFragmentCollector:
         self.__Token = ""
         self.__SkippedChars = ""
 
-    ## __IsWhiteSpace() method
-    #
-    #   Whether char at current FileBufferPos is whitespace
-    #
-    #   @param  self        The object pointer
-    #   @param  Char        The char to test
-    #   @retval True        The char is a kind of white space
-    #   @retval False       The char is NOT a kind of white space
-    #
-    def __IsWhiteSpace(self, Char):
-        if Char in (T_CHAR_NULL, T_CHAR_CR, T_CHAR_SPACE, T_CHAR_TAB, T_CHAR_LF):
-            return True
-        else:
-            return False
-
     ## __SkipWhiteSpace() method
     #
     #   Skip white spaces from current char, return number of chars skipped
diff --git a/BaseTools/Source/Python/Eot/CodeFragmentCollector.py b/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
index b977a9d532..9da5a84afe 100644
--- a/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
+++ b/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
@@ -1,7 +1,7 @@
 ## @file
 # preprocess source file
 #
-#  Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -73,21 +73,6 @@ class CodeFragmentCollector:
         self.__Token = ""
         self.__SkippedChars = ""
 
-    ## __IsWhiteSpace() method
-    #
-    #   Whether char at current FileBufferPos is whitespace
-    #
-    #   @param  self        The object pointer
-    #   @param  Char        The char to test
-    #   @retval True        The char is a kind of white space
-    #   @retval False       The char is NOT a kind of white space
-    #
-    def __IsWhiteSpace(self, Char):
-        if Char in (T_CHAR_NULL, T_CHAR_CR, T_CHAR_SPACE, T_CHAR_TAB, T_CHAR_LF):
-            return True
-        else:
-            return False
-
     ## __SkipWhiteSpace() method
     #
     #   Skip white spaces from current char, return number of chars skipped
diff --git a/BaseTools/Source/Python/GenFds/FdfParser.py b/BaseTools/Source/Python/GenFds/FdfParser.py
index 4183f318b7..5dbcb96bbd 100644
--- a/BaseTools/Source/Python/GenFds/FdfParser.py
+++ b/BaseTools/Source/Python/GenFds/FdfParser.py
@@ -275,21 +275,6 @@ class FdfParser:
         if GenFdsGlobalVariable.WorkSpaceDir == '':
             GenFdsGlobalVariable.WorkSpaceDir = os.getenv("WORKSPACE")
 
-    ## __IsWhiteSpace() method
-    #
-    #   Whether char at current FileBufferPos is whitespace
-    #
-    #   @param  self        The object pointer
-    #   @param  Char        The char to test
-    #   @retval True        The char is a kind of white space
-    #   @retval False       The char is NOT a kind of white space
-    #
-    def __IsWhiteSpace(self, Char):
-        if Char in (T_CHAR_NULL, T_CHAR_CR, T_CHAR_SPACE, T_CHAR_TAB, T_CHAR_LF):
-            return True
-        else:
-            return False
-
     ## __SkipWhiteSpace() method
     #
     #   Skip white spaces from current char, return number of chars skipped