Use StructuredWarning to disable builtin and deprecations used with it

Gemfile

@@ -135,6 +135,9 @@ gem 'gon', '~> 6.3.2'
 # Lograge to provide sane and non-verbose logging
 gem 'lograge', '~> 0.11.0'
 
+# Structured warnings to selectively disable them in production
+gem 'structured_warnings', '~> 0.4.0'
+
 # catch exceptions and send them to any airbrake compatible backend
 # don't require by default, instead load on-demand when actually configured
 gem 'airbrake', '~> 11.0.0', require: false

Gemfile.lock

@@ -1125,6 +1125,7 @@ DEPENDENCIES
   sprockets (~> 3.7.0)
   stackprof
   stringex (~> 2.8.5)
+  structured_warnings (~> 0.4.0)
   svg-graph (~> 2.2.0)
   sys-filesystem (~> 1.3.3)
   table_print (~> 1.5.6)

config/boot.rb

@@ -37,12 +37,18 @@ end
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
 
-case ENV['RAILS_ENV']
-when 'production'
-  # Disable deprecation warnings early on (before loading gems), which behaves as RUBYOPT="-w0"
-  # to disable the Ruby 2.7 warnings in production
-  Warning[:deprecated] = ENV['OPENPROJECT_PROD_DEPRECATIONS'] == 'true'
-when 'development'
+env = ENV['RAILS_ENV']
+# Disable deprecation warnings early on (before loading gems), which behaves as RUBYOPT="-w0"
+# to disable the Ruby 2.7 warnings in production.
+# Set OPENPROJECT_PROD_DEPRECATIONS=true if you want to see them for debugging purposes
+if env == 'production' && ENV['OPENPROJECT_PROD_DEPRECATIONS'] != 'true'
+  require 'structured_warnings'
+  Warning[:deprecated] = false
+  StructuredWarnings::BuiltInWarning.disable
+  StructuredWarnings::DeprecationWarning.disable
+end
+
+if env == 'development'
   $stderr.puts "Starting with bootsnap."
   require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
 end