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

src/emacs/lean-mmm-lua.el

@@ -4,26 +4,24 @@
 ;; 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
-    '(progn
-       (mmm-add-group
-        'lean-lua
-        '((lua-inline
-           :submode lua-mode
-           :face mmm-code-submode-face
-           :insert ((?l lean-tag nil @ "(*\n" @ " " _ "" @ "\n*)" @))
-           :front "[(][*]"
-           :back "[*][)]")))
-       (mmm-add-mode-ext-class 'lean-mode "\\.lean" 'lean-lua)))
-  (defun lean-mmm-lua-hook ()
-    (setq-local mmm-parse-when-idle t)
-    (setq-local mmm-idle-timer-delay 0.5)))
+(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
+      '((lua-inline
+         :submode lua-mode
+         :face mmm-code-submode-face
+         :insert ((?l lean-tag nil @ "(*\n" @ " " _ "" @ "\n*)" @))
+         :front "[(][*]"
+         :back "[*][)]")))
+     (mmm-add-mode-ext-class 'lean-mode "\\.lean" 'lean-lua)))
+(defun lean-mmm-lua-hook ()
+  (setq-local mmm-parse-when-idle t)
+  (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