Revert "Merge branch 'update_bootsnap_1.1.1' into 'master'"

This reverts commit 83ec509c, reversing
changes made to 57f0677a.

Gemfile

@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 gem 'rails', '4.2.8'
 gem 'rails-deprecated_sanitizer', '~> 1.0.3'
-gem 'bootsnap', '~> 1.1'
 # Responders respond_to and respond_with
 gem 'responders', '~> 2.0'

Gemfile.lock

@@ -83,8 +83,6 @@ GEM
     bindata (2.3.5)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    bootsnap (1.1.1)
-      msgpack (~> 1.0)
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
@@ -465,7 +463,6 @@ GEM
     minitest (5.7.0)
     mmap2 (2.2.7)
     mousetrap-rails (1.4.6)
-    msgpack (1.1.0)
     multi_json (1.12.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
@@ -930,7 +927,6 @@ DEPENDENCIES
   benchmark-ips (~> 2.3.0)
   better_errors (~> 2.1.0)
   binding_of_caller (~> 0.7.2)
-  bootsnap (~> 1.1)
   bootstrap-sass (~> 3.3.0)
   bootstrap_form (~> 2.7.0)
   brakeman (~> 3.6.0)

changelogs/unreleased/update_bootsnap_1-1-1.yml

----
-title: Bump bootsnap to 1.1.1
-merge_request: 12425
-author: @blackst0ne

config/boot.rb

@@ -5,12 +5,6 @@ ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
-begin
-  require 'bootsnap/setup'
-rescue SystemCallError => exception
-  $stderr.puts "WARNING: Bootsnap failed to setup: #{exception.message}"
-end
-
 # set default directory for multiproces metrics gathering
 if ENV['RAILS_ENV'] == 'development' || ENV['RAILS_ENV'] == 'test'
   ENV['prometheus_multiproc_dir'] ||= 'tmp/prometheus_multiproc_dir'