Remove ivy-{standard,alternative}-search #2314

Turns out ivy and counsel have a number of hard-coded checks for flx
against ivy--regex-fuzzy:

- https://github.com/abo-abo/swiper/blob/master/ivy.el#L3531
- https://github.com/abo-abo/swiper/blob/master/ivy.el#L3637
- https://github.com/abo-abo/swiper/blob/master/ivy.el#L4643
- https://github.com/abo-abo/swiper/blob/master/counsel.el#L1359
- https://github.com/abo-abo/swiper/blob/master/counsel.el#L1561

This means, by assigning our own delegates around ivy regex functions
will break flx sorting (reported in #2314), and possibly other behavior.

modules/completion/ivy/autoload/ivy.el

@@ -13,16 +13,6 @@
     (and (not (eq buffer (current-buffer)))
          (+workspace-contains-buffer-p buffer))))
 
-;;;###autoload
-(defun +ivy-standard-search (str)
-  "TODO"
-  (funcall +ivy-standard-search-fn str))
-
-;;;###autoload
-(defun +ivy-alternative-search (str)
-  "TODO"
-  (funcall +ivy-alternative-search-fn str))
-
 ;;;###autoload
 (defun +ivy-rich-buffer-name (candidate)
   "Display the buffer name.