diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index 418d6f377ff..9280d9406d1 100644
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -60,24 +60,12 @@ var headers_install = new Array();
 
 /* Mapping CL version > human readable name */
 var VC_VERSIONS = new Array();
-VC_VERSIONS[1200] = 'MSVC6 (Visual C++ 6.0)';
-VC_VERSIONS[1300] = 'MSVC7 (Visual C++ 2002)';
-VC_VERSIONS[1310] = 'MSVC7.1 (Visual C++ 2003)';
-VC_VERSIONS[1400] = 'MSVC8 (Visual C++ 2005)';
-VC_VERSIONS[1500] = 'MSVC9 (Visual C++ 2008)';
-VC_VERSIONS[1600] = 'MSVC10 (Visual C++ 2010)';
 VC_VERSIONS[1700] = 'MSVC11 (Visual C++ 2012)';
 VC_VERSIONS[1800] = 'MSVC12 (Visual C++ 2013)';
 VC_VERSIONS[1900] = 'MSVC14 (Visual C++ 2015)';
 VC_VERSIONS[1910] = 'MSVC15 (Visual C++ 2017)';
 
 var VC_VERSIONS_SHORT = new Array();
-VC_VERSIONS_SHORT[1200] = 'VC6';
-VC_VERSIONS_SHORT[1300] = 'VC7';
-VC_VERSIONS_SHORT[1310] = 'VC7.1';
-VC_VERSIONS_SHORT[1400] = 'VC8';
-VC_VERSIONS_SHORT[1500] = 'VC9';
-VC_VERSIONS_SHORT[1600] = 'VC10';
 VC_VERSIONS_SHORT[1700] = 'VC11';
 VC_VERSIONS_SHORT[1800] = 'VC12';
 VC_VERSIONS_SHORT[1900] = 'VC14';