Remove WebKit XP from Blink tooling in prepartion from removing that builder.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py
index 805e074b97b58647092d7ff8dc24c3725d3df070..5a30d7ce2a8c52e9f11f03eb4964b284760fec76 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/builders.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2011 Google Inc. All rights reserved.
+# Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
@@ -41,7 +41,6 @@ from webkitpy.common.memoized import memoized
 #      TestExpectationsParser._configuration_tokens_list
 
 _exact_matches = {
-    "WebKit XP": {"port_name": "win-xp", "specifiers": ['XP', 'Release']},
     "WebKit Win7": {"port_name": "win-win7", "specifiers": ['Win7', 'Release']},
     "WebKit Win7 (dbg)": {"port_name": "win-win7", "specifiers": ['Win7', 'Debug']},
     "WebKit Win10": {"port_name": "win-win10", "specifiers": ['Win10', 'Release']},