Remove reference to \Drupal\Core\Block\Annotation\Block (possibly more?)

Problem/Motivation

Follow up from #2798531: Add example and sections to Block API documentation that issue mentions removing reference to annotation\Block but should scope be expanded to include more modules?

 grep -r  '^ \* @[[:upper:]]' core | grep -v MigrateSource  | grep -v ConfigEntityType | grep -v ContentEntityType 

Steps to reproduce

N/A

Proposed resolution

TBD. Need to determine scope

Remaining tasks

Determine scope

User interface changes

N/A

API changes

N/A

Data model changes

N/A

Release notes snippet

N/A