Remove temp checks for ENV variables

Author: Elle Meredith

app/views/layouts/application.html.erb

@@ -38,10 +38,6 @@
     <meta property="og:site_name" content="Buildkite" />
     <meta property="og:locale" content="en_US" />
 
-    <meta name="testing-render-env-var" content="<%= ENV['RENDER_PR_APP'] %>" />
-    <meta name="testing-docker-compose-env-var" content="<%= ENV['SEGMENT_ENV'] %>" />
-    <meta name="testing-rails-env-var" content="<%= ENV['RAILS_ENV'] %>" />
-
     <%= render 'layouts/analytics', application: 'docs', title: "Docs / #{content_for(:page_title)}", logged_in: probably_authenticated? %>
 
     <% if ENV.fetch("ROBOTS_NO_INDEX") { "false" } == "true" %>