docs: stop documenting KNAPSACK_PRO_MODE

Author: 3v0k4

_posts/2017-07-17-when-distributed-locks-might-be-helpful-in-ruby-on-rails-application.md

@@ -85,7 +85,7 @@ require 'rspec'
 node_total = 5
 
 # use development API
-ENV['KNAPSACK_PRO_MODE'] = 'development'
+ENV['KNAPSACK_PRO_ENDPOINT'] = 'http://api.knapsackpro.localhost:3000'
 ENV['KNAPSACK_PRO_TEST_SUITE_TOKEN'] = '333e7b8d1b64fd6447df34a77e3662eb'
 ENV['KNAPSACK_PRO_LOG_LEVEL'] = 'warn'
 

docusaurus/docs/ruby/reference.md

@@ -206,16 +206,6 @@ Default:
 
 Available: number
 
-## `KNAPSACK_PRO_MODE` (Internal)
-
-Default: `production`
-
-Available:
-
-- `production` sets `KNAPSACK_PRO_ENDPOINT` to `https://api.knapsackpro.com`
-- `development` sets `KNAPSACK_PRO_ENDPOINT` to `http://api.knapsackpro.test:3000`
-- `test` sets `KNAPSACK_PRO_ENDPOINT` to `https://api-staging.knapsackpro.com`
-
 ## `KNAPSACK_PRO_MODIFY_DEFAULT_RSPEC_FORMATTERS` (Removed, RSpec)
 
 :::caution