Revert "Make min password size configurable"

This reverts commit 746bec2.

Author: jlledom

app/lib/authentication/by_password.rb

@@ -4,7 +4,7 @@ module ByPassword
     extend ActiveSupport::Concern
 
     # strong passwords
-    STRONG_PASSWORD_MIN_SIZE = Rails.configuration.three_scale.password_min_size
+    STRONG_PASSWORD_MIN_SIZE = 15
 
     included do
       # We only need length validations as they are already set in Authentication::ByPassword

config/examples/settings.yml

@@ -19,7 +19,6 @@ base: &default
   janitor_worker_enabled: true
   onpremises: false
   onpremises_api_docs_version: false
-  password_min_size: <%= ENV.fetch('THREESCALE_PASSWORD_MIN_SIZE', '15') %>
   readonly_custom_domains_settings: <%= ENV.fetch('READONLY_CUSTOM_DOMAINS_SETTINGS', '0') == '1' %>
   recaptcha_private_key: <%= ENV['RECAPTCHA_PRIVATE_KEY'] %>
   recaptcha_public_key: <%= ENV.fetch('RECAPTCHA_PUBLIC_KEY', 'YOUR_RECAPTCHA_PUBLIC_KEY') %>