[spacemacs-evil] Use evil-collection for occur-mode support

This ensures that occur-edit-mode doesn't leave the buffer in
evilified-state, which is inconvenient to edit from.

layers/+spacemacs/spacemacs-defaults/packages.el

@@ -43,7 +43,6 @@
  (hi-lock :location built-in)
  (image-mode :location built-in)
  (imenu :location built-in)
- (occur-mode :location built-in)
  (package-menu :location built-in)
  ;; page-break-lines is shipped with spacemacs core
  (page-break-lines :location built-in)
@@ -355,10 +354,6 @@
  lazy-loading-line-numbers)
  (global-display-line-numbers-mode)))))))
 
-(defun spacemacs-defaults/init-occur-mode ()
- (evilified-state-evilify-map occur-mode-map
- :mode occur-mode))
-
 (defun spacemacs-defaults/init-package-menu ()
  (evilified-state-evilify-map package-menu-mode-map
  :mode package-menu-mode))

layers/+spacemacs/spacemacs-evil/config.el

@@ -31,5 +31,5 @@
 (defvar evil-lisp-safe-structural-editing-modes '()
  "A list of major mode symbols where safe structural editing is supported.")
 
-(defvar spacemacs-evil-collection-allowed-list '(eww dired quickrun ediff)
+(defvar spacemacs-evil-collection-allowed-list '(dired ediff eww quickrun replace)
  "List of modes Spacemacs will allow to be evilified by ‘evil-collection-init’.")