Simplify ruby layer use-package

`:mode` implies `:defer t` so I removed all the `:defer t` when
`:mode` is used

contrib/lang/ruby/packages.el

@@ -36,7 +36,6 @@
 (defun ruby/init-enh-ruby-mode ()
   "Initialize Ruby Mode"
   (use-package enh-ruby-mode
-    :defer t
     :mode (("\\(Rake\\|Thor\\|Guard\\|Gem\\|Cap\\|Vagrant\\|Berks\\|Pod\\|Puppet\\)file\\'" . enh-ruby-mode)
            ("\\.\\(rb\\|rabl\\|ru\\|builder\\|rake\\|thor\\|gemspec\\|jbuilder\\)\\'" . enh-ruby-mode))))
 
@@ -49,7 +48,8 @@
 (defun ruby/init-bundler ()
   (use-package bundler
     :defer t
-    :init (progn
+    :init
+    (progn
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mbc" 'bundle-check)
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mbi" 'bundle-install)
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mbs" 'bundle-console)
@@ -59,9 +59,11 @@
 (defun ruby/init-projectile-rails ()
   (use-package projectile-rails
     :defer t
-    :init (progn
+    :init
+    (progn
       (add-hook 'projectile-mode-hook 'projectile-rails-on))
-    :config (progn
+    :config
+    (progn
       (spacemacs|diminish projectile-rails-mode " ⇋" " R")
                                         ; Code navigation
       ;; Find files
@@ -114,7 +116,8 @@
   (use-package robe
     :defer t
     :init (add-hook 'enh-ruby-mode-hook 'robe-mode)
-    :config (progn
+    :config
+    (progn
       (spacemacs|diminish robe-mode " ♦" " r")
       ;; robe mode specific
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mgg" 'robe-jump)
@@ -131,17 +134,15 @@
 (defun ruby/init-yaml-mode ()
   "Initialize YAML mode"
   (use-package yaml-mode
-    :defer t
+    :mode (("\\.\\(yml\\|yaml\\)\\'" . yaml-mode)
+           ("Procfile\\'" . yaml-mode))
     :config (add-hook 'yaml-mode-hook
                       '(lambda ()
-                         (define-key yaml-mode-map "\C-m" 'newline-and-indent)))
-    :mode (("\\.\\(yml\\|yaml\\)\\'" . yaml-mode)
-           ("Procfile\\'" . yaml-mode))))
+                         (define-key yaml-mode-map "\C-m" 'newline-and-indent)))))
 
 (defun ruby/init-feature-mode ()
   "Initialize Cucumber feature mode"
   (use-package feature-mode
-    :defer t
     :mode (("\\.feature\\'" . feature-mode))))