* xml.el (xml-parse-tag, xml-parse-string, xml-parse-attlist)

* xml.el (xml-parse-tag, xml-parse-string, xml-parse-attlist)
(xml-parse-dtd, xml-parse-elem-type, xml-substitute-special):
Return to use of the -no-properties variants.  There was
consensus on emacs-devel that the speed of these variants was
prefered since we are usually parsing files (from the internet
or on disk) instead of XML created in Emacs.