Bug 699753 - Remove duplicate copy of errNcrControlChar from htmlparser.properties. r=smaug.

dom/locales/en-US/chrome/layout/htmlparser.properties

@@ -96,7 +96,6 @@ errEofInSystemId=End of file inside system identifier.
 errExpectedSystemId=Expected a system identifier but the doctype ended.
 errMissingSpaceBeforeDoctypeName=Missing space before doctype name.
 errHyphenHyphenBang=“--!” found in comment.
-errNcrControlChar=Character reference expands to a control character.
 errNcrZero=Character reference expands to zero.
 errNoSpaceBetweenDoctypeSystemKeywordAndQuote=No space between the doctype “SYSTEM” keyword and the quote.
 errNoSpaceBetweenPublicAndSystemIds=No space between the doctype public and system identifiers.