completion/ivy: replace smex with amx

Faster and maintained.

modules/completion/ivy/config.el

@@ -121,12 +121,6 @@ immediately runs it on the current candidate (ending the ivy session)."
   (ivy-set-display-transformer #'counsel-projectile-find-file #'+ivy-projectile-find-file-transformer))
 
 
-;; Used by `counsel-M-x'
-(after! smex
-  (setq smex-save-file (concat doom-cache-dir "/smex-items"))
-  (smex-initialize))
-
-
 (def-package! ivy-hydra
   :commands (+ivy@coo/body ivy-dispatching-done-hydra)
   :init
@@ -227,6 +221,10 @@ immediately runs it on the current candidate (ending the ivy session)."
         ivy-initial-inputs-alist nil))
 
 
+;; Used by `counsel-M-x'
+(setq amx-save-file (concat doom-cache-dir "/smex-items"))
+
+
 ;;
 ;; Evil key fixes
 ;;

modules/completion/ivy/packages.el

@@ -1,10 +1,10 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; completion/ivy/packages.el
 
+(package! amx)
 (package! ivy)
 (package! counsel)
 (package! counsel-projectile)
-(package! smex)
 (package! swiper)
 (package! ivy-hydra)
 (package! ivy-rich)