We are not using those (apart from in legacy nested pages).

 As in , I only see references to minified non debug versions of these files. You should be able to remove them, but make sure the platform still builds config manager and it loads properly. I'd still archive them just in case we ever had to rebuild the minified versions (although I don't even know what build tools would do that at this point)

 I am thinking to remove those yui files from HPCC repo. Any objection?

 I saw that the esp/files/configmgr.html does include some yui files (but not those 4 files). Do you have any objection if I remove those 4 files from HPCC repo? 

By searching HPCC repo, I did not see a file which includes: selector-debug.js, selector.js, dom-debug.js, and and dom.js. We may remove those yui files.

2 types of Inefficient regular expression alerts:

1.  alert: This part of the regular expression may cause exponential backtracking on strings starting with '[' and containing many repetitions of 'a'.

The alert is for: attributes: /^[([a-z]\w*)(=?)?['"]?(

]*?)['"]?]/i,

 (in esp/files/yui/build/selector/selector-debug.js:542 and esp/files/yui/build/selector/selector.js:535).

2. alert: This part of the regular expression may cause exponential backtracking on strings starting with '9' and containing many repetitions of '0'.

The alert is for: re_unit = /^(\d[.\d]*)+(em|ex|px|gd|rem|vw|vh|vm|ch|mm|cm|in|pt|pc|deg|rad|ms|s|hz|khz|%){1}?/i,

(in esp/files/yui/build/dom/dom-debug.js:1650 and esp/files/yui/build/dom/dom.js:1610).