(OUI Docs) Update Form validation page (#986) (#994)

* Align with updated form validation guidelines (#885)

Signed-off-by: Danila Gulderov <[email protected]>

* changelog update (#885)

Signed-off-by: Danila Gulderov <[email protected]>

* Update CHANGELOG.md

Co-authored-by: Miki <[email protected]>
Signed-off-by: Danila Gulderov <[email protected]>

---------

Signed-off-by: Danila Gulderov <[email protected]>
Co-authored-by: Miki <[email protected]>
(cherry picked from commit 79a8808)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

# Conflicts:
#	CHANGELOG.md

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src-docs/src/views/form_validation/form_validation_example.js

@@ -37,9 +37,7 @@ export const FormValidationExample = {
           Validation is achieved by applying <OuiCode>isInvalid</OuiCode> and
           optionally error props onto the <strong>OuiForm</strong> or{' '}
           <strong>OuiFormRow</strong> components. Errors are optional and are
-          passed as an array in case you need to list more than one. You can
-          also hide the callout by passing
-          <OuiCode>invalidCallout=&ldquo;none&ldquo;</OuiCode>.
+          passed as an array in case you need to list more than one.
         </p>
       ),
       source: [