DEV: allow for method deprecation using Discourse.deprecate

New method deprecator will ensure one log message an hour happens
for all deprecated method calls per call site

Also removes unused monkey patches to ActiveRecord::Base

lib/discourse.rb

@@ -527,6 +527,23 @@ module Discourse
     end
   end
 
+  def self.deprecate(warning)
+    location = caller_locations[1]
+    warning = "Deprecation Notice: #{warning}\nAt: #{location.label} #{location.path}:#{location.lineno}"
+    if Rails.env == "development"
+      STDERR.puts(warning)
+    end
+
+    digest = Digest::MD5.hexdigest(warning)
+    redis_key = "deprecate-notice-#{digest}"
+
+    if !$redis.without_namespace.get(redis_key)
+      Rails.logger.warn(warning)
+      $redis.without_namespace.setex(redis_key, 3600, "x")
+    end
+    warning
+  end
+
   SIDEKIQ_NAMESPACE ||= 'sidekiq'.freeze
 
   def self.sidekiq_redis_config