IE6 XHR causes warning in Google Closure compiler

[amuraco]

Closure Compiler error:

xstyle/load-imports.js:236: WARNING - unreachable code
        var progIds = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];
        ^

Appears that the IE6-Specific XHR shouldn't even work since that progIds is never set, so It probably should be fixed or removed (all the XHR code) if xstyle doesn't need to work with IE6. IE7+ use the standard XMLHttpRequest object