Remove last bits of Semaphore config and artifacts

README.md

@@ -9,7 +9,6 @@ issues.
 - [Ruby code documentation][ruby-doc]
 - [Support][contact]
 
-[![Build status](https://appsignal.semaphoreci.com/badges/appsignal-ruby/branches/main.svg)](https://appsignal.semaphoreci.com/projects/appsignal-ruby)
 [![Gem Version](https://badge.fury.io/rb/appsignal.svg)](http://badge.fury.io/rb/appsignal)
 [![Code Climate](https://codeclimate.com/github/appsignal/appsignal.png)](https://codeclimate.com/github/appsignal/appsignal)
 

Rakefile

@@ -127,7 +127,7 @@ namespace :build_matrix do
       output = `git status`
       if output.include? GITHUB_ACTION_WORKFLOW_FILE
         puts "The `#{GITHUB_ACTION_WORKFLOW_FILE}` is modified. The changes were not committed."
-        puts "Please run `rake build_matrix:semaphore:generate` and commit the changes."
+        puts "Please run `rake build_matrix:github:generate` and commit the changes."
         exit 1
       end
     end