Remove jQuery UI

jQuery UI is no longer used anywhere so say goodbye to it from package.json & Gemfile

Gemfile

@@ -236,7 +236,6 @@ gem 'gemojione',          '~> 3.0'
 gem 'gon',                '~> 6.1.0'
 gem 'jquery-atwho-rails', '~> 1.3.2'
 gem 'jquery-rails',       '~> 4.1.0'
-gem 'jquery-ui-rails',    '~> 5.0.0'
 gem 'request_store',      '~> 1.3'
 gem 'select2-rails',      '~> 3.5.9'
 gem 'virtus',             '~> 1.0.1'

Gemfile.lock

@@ -374,8 +374,6 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    jquery-ui-rails (5.0.5)
-      railties (>= 3.2.16)
     json (1.8.6)
     json-schema (2.6.2)
       addressable (~> 2.3.8)
@@ -906,7 +904,6 @@ DEPENDENCIES
   jira-ruby (~> 1.1.2)
   jquery-atwho-rails (~> 1.3.2)
   jquery-rails (~> 4.1.0)
-  jquery-ui-rails (~> 5.0.0)
   json-schema (~> 2.6.2)
   jwt (~> 1.5.6)
   kaminari (~> 0.17.0)

package.json

@@ -21,7 +21,6 @@
     "dropzone": "^4.2.0",
     "es6-promise": "^4.0.5",
     "jquery": "^2.2.1",
-    "jquery-ui": "git+https://github.com/jquery/jquery-ui#1.11.4",
     "jquery-ujs": "^1.2.1",
     "js-cookie": "^2.1.3",
     "mousetrap": "^1.4.6",

spec/javascripts/new_branch_spec.js

 /* eslint-disable space-before-function-paren, one-var, no-var, one-var-declaration-per-line, no-return-assign, quotes, max-len */
 /* global NewBranchForm */
 
-require('jquery-ui/ui/autocomplete');
 require('~/new_branch_form');
 
 (function() {