Remove unnecessary helm configuration code

There options are already the default.

modules/prelude-helm.el

@@ -57,15 +57,12 @@
  helm-google-suggest-use-curl-p t
  helm-scroll-amount 4 ; scroll 4 lines other window using M-<next>/M-<prior>
  helm-quick-update t ; do not display invisible candidates
- helm-idle-delay 0.01 ; be idle for this many seconds, before updating in delayed sources.
- helm-input-idle-delay 0.01 ; be idle for this many seconds, before updating candidate buffer
  helm-ff-search-library-in-sexp t ; search for library in `require' and `declare-function' sexp.
  helm-split-window-default-side 'other ;; open helm buffer in another window
  helm-split-window-in-side-p t ;; open helm buffer inside current window, not occupy whole other window
  helm-buffers-favorite-modes (append helm-buffers-favorite-modes
                                      '(picture-mode artist-mode))
  helm-candidate-number-limit 500 ; limit the number of displayed canidates
- helm-M-x-requires-pattern 0    ; show all candidates when set to 0
  helm-ff-file-name-history-use-recentf t
  helm-move-to-line-cycle-in-source t ; move to end or beginning of source
                                         ; when reaching top or bottom of source.
@@ -79,9 +76,6 @@
 (global-set-key (kbd "C-c h x") 'helm-register)
 (global-set-key (kbd "C-c h SPC") 'helm-all-mark-rings)
 
-;;; Save current position to mark ring
-(add-hook 'helm-goto-line-before-hook 'helm-save-current-pos-to-mark-ring)
-
 ;; PACKAGE: helm-projectile
 (require 'helm-projectile)
 (push "Press <C-c p h> to navigate a project in Helm." prelude-tips)