Remove Coveralls integration

Has been failing silently for a long time without anyone really
missing it.

REDMINE-18079

Gemfile

@@ -9,8 +9,6 @@ gem 'pageflow-support', path: 'spec/support'
 
 gem 'spring-commands-rspec', group: :development
 
-gem 'coveralls', require: false
-
 # Early failure output
 gem 'rspec-instafail', '~> 0.4.0', require: false
 

README.md

@@ -2,7 +2,6 @@
 
 [![Gem Version](https://badge.fury.io/rb/pageflow.svg)](http://badge.fury.io/rb/pageflow)
 [![Build Status](https://github.com/codevise/pageflow/workflows/tests/badge.svg)](https://github.com/codevise/pageflow/actions)
-[![Coverage Status](https://coveralls.io/repos/github/codevise/pageflow/badge.svg?branch=master)](https://coveralls.io/github/codevise/pageflow?branch=master)
 [![Code Climate](https://codeclimate.com/github/codevise/pageflow/badges/gpa.svg)](https://codeclimate.com/github/codevise/pageflow)
 [![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com)
 

spec/spec_helper.rb

@@ -1,8 +1,5 @@
 ENV['RAILS_ENV'] ||= 'test'
 
-require 'coveralls'
-Coveralls.wear!
-
 require 'rails-controller-testing'
 require 'rspec/rails'
 require 'rspec/collection_matchers'