feat(emacs): assume lua-mode and mmm-mode are available

src/emacs/lean-mmm-lua.el

@@ -4,14 +4,12 @@
 ;; Author: Soonho Kong
 ;;
 
-(when (and (package-installed-p 'mmm-mode)
-           (package-installed-p 'lua-mode))
-  (require 'mmm-mode)
-  (require 'mmm-auto)
-  (require 'lua-mode)
-  (setq mmm-global-mode 'maybe)
-  (setq mmm-submode-decoration-level 0)
-  (eval-after-load 'mmm-vars
+(require 'mmm-mode)
+(require 'mmm-auto)
+(require 'lua-mode)
+(setq mmm-global-mode 'maybe)
+(setq mmm-submode-decoration-level 0)
+(eval-after-load 'mmm-vars
   '(progn
      (mmm-add-group
       'lean-lua
@@ -22,8 +20,8 @@
          :front "[(][*]"
          :back "[*][)]")))
      (mmm-add-mode-ext-class 'lean-mode "\\.lean" 'lean-lua)))
-  (defun lean-mmm-lua-hook ()
+(defun lean-mmm-lua-hook ()
   (setq-local mmm-parse-when-idle t)
-    (setq-local mmm-idle-timer-delay 0.5)))
+  (setq-local mmm-idle-timer-delay 0.5))
 
 (provide 'lean-mmm-lua)

src/emacs/lean-mode.el

@@ -176,9 +176,7 @@ enabled and disabled respectively.")
   (when lean-company-use
     (company-lean-hook))
   ;; mmm-lua-mode
-  (when (and (package-installed-p 'mmm-mode)
-             (package-installed-p 'lua-mode))
-    (lean-mmm-lua-hook)))
+  (lean-mmm-lua-hook))
 
 ;; Automode List
 ;;;###autoload