Remove deprecated rspec/integration

lib/telegram/bot.rb

@@ -14,10 +14,10 @@ module Telegram
 
     module_function
 
-    def deprecation_0_15
+    def deprecation_0_16
       @deprecation ||= begin
         require 'active_support/deprecation'
-        ActiveSupport::Deprecation.new('0.15', 'Telegram::Bot')
+        ActiveSupport::Deprecation.new('0.16', 'Telegram::Bot')
       end
     end
 

lib/telegram/bot/rspec/integration.rb

@@ -1,10 +0,0 @@
-require 'telegram/bot'
-Telegram::Bot.deprecation_0_15.warn(
-  "`require 'telegram/bot/rspec/integration'` is deprecated in favor of " \
-  "`require 'telegram/bot/rspec/integration/rails'`"
-)
-require 'telegram/bot/rspec/integration/rails'
-
-Telegram::Bot::RSpec.with_include_context do |config|
-  config.include_context 'telegram/bot/integration/rails', telegram_bot: true
-end