Revert "mu4e: add evil-mu4e package."

This reverts commit 3cb341bf71.

We should be able to dynamically switch between editing styles so evil-mu4e must
be able to revert its changes. For instance you start Emacs in Vim style and
have evil-mu4e activated then when you switch to Emacs style evil-mu4e should
revert its changes. See evil-magit for inspiration on how to do it.

Evilified maps supports hot switching of editing style out of the box.

layers/+email/mu4e/README.org

@@ -71,7 +71,6 @@ existing =dotspacemacs-configuration-layers= list in this file.
 | Keybinding | Command                                                     |
 |------------+-------------------------------------------------------------|
 | ~J~        | Go to next unread thread marking other mail read on the way |
-| ~T~        | Go to next unread thread marking other mail read on the way |
 | ~C-j~      | Next header                                                 |
 | ~C-k~      | Previous header                                             |
 
@@ -80,7 +79,6 @@ existing =dotspacemacs-configuration-layers= list in this file.
 | Keybinding | Command                                                     |
 |------------+-------------------------------------------------------------|
 | ~J~        | Go to next unread thread marking other mail read on the way |
-| ~T~        | Go to next unread thread marking other mail read on the way |
 | ~C-j~      | Next header                                                 |
 | ~C-k~      | Previous header                                             |
 

layers/+email/mu4e/packages.el

@@ -17,7 +17,6 @@
         (helm-mu :requires helm)
         org
         persp-mode
-        evil-mu4e
         ))
 
 (defun mu4e/post-init-persp-mode ()
@@ -54,6 +53,39 @@
 
     :config
     (progn
+      (evilified-state-evilify-map mu4e-main-mode-map
+        :mode mu4e-main-mode
+        :bindings
+        (kbd "j") 'mu4e~headers-jump-to-maildir)
+
+      (evilified-state-evilify-map
+       mu4e-headers-mode-map
+       :mode mu4e-headers-mode
+       :bindings
+       (kbd "C-j") 'mu4e-headers-next
+       (kbd "C-k") 'mu4e-headers-prev
+       (kbd "J") (lambda ()
+                   (interactive)
+                   (mu4e-headers-mark-thread nil '(read))))
+
+      (evilified-state-evilify-map
+       mu4e-view-mode-map
+       :mode mu4e-view-mode
+       :bindings
+       (kbd "C-j") 'mu4e-view-headers-next
+       (kbd "C-k") 'mu4e-view-headers-prev
+       (kbd "J") (lambda ()
+                   (interactive)
+                    (mu4e-view-mark-thread '(read))))
+
+      (spacemacs/set-leader-keys-for-major-mode 'mu4e-compose-mode
+        dotspacemacs-major-mode-leader-key 'message-send-and-exit
+        "c" 'message-send-and-exit
+        "k" 'message-kill-buffer
+        "a" 'message-kill-buffer
+        "s" 'message-dont-send         ; saves as draft
+        "f" 'mml-attach-file)
+
       (when mu4e-enable-async-operations
         (require 'smtpmail-async)
         (setq send-mail-function         'async-smtpmail-send-it
@@ -99,7 +131,3 @@ mu4e-use-maildirs-extension-load to be evaluated after mu4e has been loaded."
 (defun mu4e/pre-init-org ()
   ;; load org-mu4e when org is actually loaded
   (with-eval-after-load 'org (require 'org-mu4e nil 'noerror)))
-
-(defun mu4e/init-evil-mu4e()
-  (use-package evil-mu4e
-    :after mu4e))