Remove unused indexes (#7829)

db/migrate/20180617162849_remove_unused_indexes.rb

@@ -0,0 +1,7 @@
+class RemoveUnusedIndexes < ActiveRecord::Migration[5.2]
+  def change
+    remove_index :statuses, name: "index_statuses_on_conversation_id"
+    remove_index :users, name: "index_users_on_filtered_languages"
+    remove_index :backups, name: "index_backups_on_user_id"
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_06_16_192031) do
+ActiveRecord::Schema.define(version: 2018_06_17_162849) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -103,7 +103,6 @@ ActiveRecord::Schema.define(version: 2018_06_16_192031) do
     t.boolean "processed", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["user_id"], name: "index_backups_on_user_id"
   end
 
   create_table "blocks", force: :cascade do |t|
@@ -448,7 +447,6 @@ ActiveRecord::Schema.define(version: 2018_06_16_192031) do
     t.bigint "application_id"
     t.bigint "in_reply_to_account_id"
     t.index ["account_id", "id", "visibility", "updated_at"], name: "index_statuses_20180106", order: { id: :desc }
-    t.index ["conversation_id"], name: "index_statuses_on_conversation_id"
     t.index ["in_reply_to_id"], name: "index_statuses_on_in_reply_to_id"
     t.index ["reblog_of_id", "account_id"], name: "index_statuses_on_reblog_of_id_and_account_id"
     t.index ["uri"], name: "index_statuses_on_uri", unique: true
@@ -529,7 +527,6 @@ ActiveRecord::Schema.define(version: 2018_06_16_192031) do
     t.index ["account_id"], name: "index_users_on_account_id"
     t.index ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true
     t.index ["email"], name: "index_users_on_email", unique: true
-    t.index ["filtered_languages"], name: "index_users_on_filtered_languages", using: :gin
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
   end