* lisp/nxml/nxml-util.el (nxml-with-unmodifying-text-property-changes):

* lisp/nxml/nxml-util.el (nxml-with-unmodifying-text-property-changes):
Remove.

* lisp/nxml/rng-valid.el (rng-validate-mode)
(rng-after-change-function, rng-do-some-validation):
* lisp/nxml/rng-maint.el (rng-validate-buffer):
* lisp/nxml/nxml-rap.el (nxml-tokenize-forward, nxml-ensure-scan-up-to-date):
* lisp/nxml/nxml-outln.el (nxml-show-all, nxml-set-outline-state):
* lisp/nxml/nxml-mode.el (nxml-mode, nxml-degrade, nxml-after-change)
(nxml-extend-after-change-region): Use with-silent-modifications.