Remove Tolk, Crowdin substituted it

Why:

* Crowdin now hosts all consul translations publicly so anyone can contribute https://crowdin.com/project/consul/invite
* Crowdin makes easy for non-tech people to contribute, once we have a demo site we'll be able to offer "on site" translation
* If you still use Tolk, we recommend removing this commit (but adding tolk gem to ./Gemfile_custom file to avoid future merge conflicts)

How:

* Reverting changes introduced with 9610a6a933

Gemfile

@@ -59,7 +59,6 @@ gem 'sitemap_generator', '~> 5.3.1'
 
 gem 'ahoy_matey', '~> 1.6.0'
 gem 'groupdate', '~> 3.2.0' # group temporary data
-gem 'tolk', '~> 2.0.0' # Web interface for translations
 
 gem 'browser'
 gem 'turnout', '~> 2.4.0'

Gemfile.lock

@@ -387,7 +387,6 @@ GEM
     rvm1-capistrano3 (1.4.0)
       capistrano (~> 3.0)
       sshkit (>= 1.2)
-    safe_yaml (1.0.4)
     safely_block (0.2.0)
       errbase
     sass (3.4.23)
@@ -445,9 +444,6 @@ GEM
     tilt (2.0.7)
     timecop (0.8.1)
     tins (1.13.2)
-    tolk (2.0.0)
-      rails (>= 4.0)
-      safe_yaml (>= 0.8.6)
     turbolinks (2.5.3)
       coffee-rails
     turnout (2.4.0)
@@ -559,7 +555,6 @@ DEPENDENCIES
   spring
   spring-commands-rspec
   sprockets (~> 3.7.1)
-  tolk (~> 2.0.0)
   turbolinks
   turnout (~> 2.4.0)
   uglifier (~> 3.2.0)

config/initializers/tolk.rb

@@ -1,25 +0,0 @@
-# encoding: utf-8
-
-# Tolk config file. Generated on January 14, 2016 12:09
-# See github.com/tolk/tolk for more informations
-
-Tolk.config do |config|
-
-  # If you need to add a mapping do it like this :
-  # May we suggest you use http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
-  # config.mapping['en-AU']   = 'English (Australia)'
-  # config.mapping['es-MX']   = 'Spanish (Mexico)'
-  # config.mapping['fr-ES']   = 'Frañol !'
-  # config.mapping['is']      = 'Icelandic'
-  # config.mapping['vi']      = 'Vietnamese'
-
-  # Master source of strings to be translated
-  config.primary_locale_name = 'en'
-end
-
-Tolk::ApplicationController.authenticator = proc {
-  authenticate_or_request_with_http_basic do |username, password|
-    username == Rails.application.secrets.translate_username &&
-      password == Rails.application.secrets.translate_password
-  end
-}

config/routes.rb

@@ -416,7 +416,6 @@ Rails.application.routes.draw do
   end
 
   mount GraphiQL::Rails::Engine, at: '/graphiql', graphql_path: '/graphql'
-  mount Tolk::Engine => '/translate', :as => 'tolk'
 
   # more info pages
   get 'more-information',                     to: 'pages#show', id: 'more_info/index',                as: 'more_info'

config/secrets.yml.example

@@ -33,9 +33,6 @@ production: &production
   google_oauth2_key: ""
   google_oauth2_secret: ""
 
-  translate_username: ""
-  translate_password:  ""
-
   rollbar_server_token: ""
   server_name: ""
 

db/migrate/20170708225159_remove_tolk.rb

@@ -0,0 +1,10 @@
+class RemoveTolk < ActiveRecord::Migration
+  def change
+    remove_index :tolk_translations, column: [:phrase_id, :locale_id]
+    remove_index :tolk_locales, column: :name
+
+    drop_table :tolk_translations
+    drop_table :tolk_phrases
+    drop_table :tolk_locales
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170704105112) do
+ActiveRecord::Schema.define(version: 20170708225159) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -860,32 +860,6 @@ ActiveRecord::Schema.define(version: 20170704105112) do
   add_index "tags", ["proposals_count"], name: "index_tags_on_proposals_count", using: :btree
   add_index "tags", ["spending_proposals_count"], name: "index_tags_on_spending_proposals_count", using: :btree
 
-  create_table "tolk_locales", force: :cascade do |t|
-    t.string   "name"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-  end
-
-  add_index "tolk_locales", ["name"], name: "index_tolk_locales_on_name", unique: true, using: :btree
-
-  create_table "tolk_phrases", force: :cascade do |t|
-    t.text     "key"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-  end
-
-  create_table "tolk_translations", force: :cascade do |t|
-    t.integer  "phrase_id"
-    t.integer  "locale_id"
-    t.text     "text"
-    t.text     "previous_text"
-    t.boolean  "primary_updated", default: false
-    t.datetime "created_at"
-    t.datetime "updated_at"
-  end
-
-  add_index "tolk_translations", ["phrase_id", "locale_id"], name: "index_tolk_translations_on_phrase_id_and_locale_id", unique: true, using: :btree
-
   create_table "users", force: :cascade do |t|
     t.string   "email",                                     default: ""
     t.string   "encrypted_password",                        default: "",                    null: false