Revert "Switch to Ariake Dark for Vim"

This reverts commit aa661244402ddb4f4e4d80998a39c4e60fcea7e7.

vimrc

···
 call plug#begin('~/.vim/plugged')
 
 " Theming
-Plug 'davidcelis/vim-ariake-dark'
+Plug 'chriskempson/tomorrow-theme', { 'rtp': 'vim' }
 Plug 'junegunn/goyo.vim'
 Plug 'vim-airline/vim-airline'
 Plug 'vim-airline/vim-airline-themes'
···
 Plug 'tpope/vim-markdown',      { 'for': 'markdown' }
 Plug 'tpope/vim-rails',         { 'for': 'ruby' }
 Plug 'stephencelis/vim-mml',    { 'for': 'mml' }
-Plug 'hashicorp/sentinel.vim',  { 'for': 'sentinel' }
 
 " Utilities
 Plug 'tpope/vim-bundler',       { 'on': 'Bundle' }
···
 
 " Theme/Colors
 syntax on
-silent! colorscheme Ariake-Dark
+
+silent! colorscheme Tomorrow-Night
 set background=dark
 set cursorline
 set nowrap