Remove deprecated packages, mostly from Emacswiki

See: https://github.com/melpa/melpa/pull/5008

lisp/init-crontab.el

-(require-package 'crontab-mode)
-(add-auto-mode 'crontab-mode "\\.?cron\\(tab\\)?\\'")
-
-(provide 'init-crontab)

lisp/init-dired.el

-(require-package 'dired+)
-(require-package 'dired-sort)
-
-(setq-default diredp-hide-details-initially-flag nil
-              dired-dwim-target t)
-
-(after-load 'dired
-  (require 'dired+)
-  (require 'dired-sort)
-  (when (fboundp 'global-dired-hide-details-mode)
-    (global-dired-hide-details-mode -1))
-  (setq dired-recursive-deletes 'top)
-  (define-key dired-mode-map [mouse-2] 'dired-find-file)
-  (add-hook 'dired-mode-hook
-            (lambda () (guide-key/add-local-guide-key-sequence "%"))))
-
-
-(provide 'init-dired)

lisp/init-ido.el

-;; Use C-f during file selection to switch to regular find-file
-(require 'ido)
-(ido-mode t)
-(ido-everywhere nil)
-(setq ido-enable-flex-matching t)
-(setq ido-use-filename-at-point nil)
-(setq ido-auto-merge-work-directories-length 0)
-(setq ido-use-virtual-buffers t)
-
-(when (eval-when-compile (>= emacs-major-version 24))
- (require-package 'ido-completing-read+)
- (ido-ubiquitous-mode t))
-
-;; Use smex to handle M-x
-(when (eval-when-compile (>= emacs-major-version 24))
-  (require-package 'smex)
-  ;; Change path for ~/.smex-items
-  (setq smex-save-file (expand-file-name ".smex-items" user-emacs-directory))
-  (global-set-key [remap execute-extended-command] 'smex))
-
-(require-package 'idomenu)
-
-;; Allow the same buffer to be open in different frames
-(setq ido-default-buffer-method 'selected-window)
-
-;; http://www.reddit.com/r/emacs/comments/21a4p9/use_recentf_and_ido_together/cgbprem
-(add-hook 'ido-setup-hook (lambda () (define-key ido-completion-map [up] 'previous-history-element)))
-
-
-
-
-(provide 'init-ido)