Remove needless white list sanitizer deprecations

Keeping support for these methods, without deprecations, makes Rails 5.2
just work.

Then Rails 6 will depend on 1.2.0 which uses safe_list_sanitizer etc.

Sorry for all the needless ruckus and confusion around 1.1.0!

lib/rails-html-sanitizer.rb

@@ -20,8 +20,6 @@ def safe_list_sanitizer
         end
 
         def white_list_sanitizer
-          ActiveSupport::Deprecation.warn "warning: white_list_sanitizer is" \
-          " deprecated, please use safe_list_sanitizer instead."
           safe_list_sanitizer
         end
       end

lib/rails/html/sanitizer.rb

@@ -151,8 +151,5 @@ def allowed_attributes(options)
     end
 
     WhiteListSanitizer = SafeListSanitizer
-    if Object.respond_to?(:deprecate_constant)
-      deprecate_constant :WhiteListSanitizer
-    end
   end
 end