hi-lock-unface-buffer
hi-lock-unface-buffer is an interactive autoloaded compiled Lisp function in `hi-lock.el
'.
(hi-lock-unface-buffer REGEXP)
Remove highlighting of each match to REGEXP set by hi-lock.
Interactively, prompt for REGEXP, accepting only regexps
previously inserted by hi-lock interactive functions.
If REGEXP is t (or if C-u was specified interactively),
then remove all hi-lock highlighting.