ENGCOM-5487: Resolved Can not save 'CMS Block' with empty content issue 23800 #23801

 - Merge Pull Request #23801 from edenduong/magento2:2.3-bugfix/should_no_validate_content_issue23800
 - Merged commits:
   1. 1435253

Author: magento-engcom-team

app/code/Magento/Cms/view/adminhtml/ui_component/cms_block_form.xml

@@ -148,9 +148,6 @@
                 <additionalClasses>
                     <class name="admin__field-wide">true</class>
                 </additionalClasses>
-                <validation>
-                    <rule name="required-entry" xsi:type="boolean">true</rule>
-                </validation>
                 <label/>
                 <dataScope>content</dataScope>
             </settings>