remove deprecated `:tokenizer` option from guide [ci skip]

`:tokenizer` option was deprecated in 1c341eb7cbaeb52435f14c2595e391bfb2e5e38b

1 files changed, 0 insertions, 15 deletions

diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md
index dd4d9f55fa..fe42cec158 100644
--- a/guides/source/active_record_validations.md
+++ b/guides/source/active_record_validations.md
@@ -457,21 +457,6 @@ class Person < ActiveRecord::Base
 end
 ```
 
-This helper counts characters by default, but you can split the value in a
-different way using the `:tokenizer` option:
-
-```ruby
-class Essay < ActiveRecord::Base
-  validates :content, length: {
-    minimum: 300,
-    maximum: 400,
-    tokenizer: lambda { |str| str.split(/\s+/) },
-    too_short: "must have at least %{count} words",
-    too_long: "must have at most %{count} words"
-  }
-end
-```
-
 Note that the default error messages are plural (e.g., "is too short (minimum
 is %{count} characters)"). For this reason, when `:minimum` is 1 you should
 provide a personalized message or use `presence: true` instead. When