Geo: Clean up: Remove `log_geo_deleted_event` stubs

The following discussion from !36594 (merged) should be addressed:

• @mkozono started a discussion:

  Actually this issue is closed, but we don't need this old event method for SSF blobs since we replicate delete events, which would be triggered without needing this hook https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/uploaders/ee/object_storage.rb

The existence of this concern and its method are causing unnecessary maintenance work: !50740 (diffs, comment 488385416)

Implementation Guide

• Add the event directly to Uploaders that still need it => No longer needed after the migration to Geo Self-Service Framework was finished. All of these methods are a no-op.
• Remove the concern https://gitlab.com/gitlab-org/gitlab/-/blob/v13.8.0-ee/ee/app/uploaders/ee/object_storage.rb
• Remove alias_method :upload, :model: !50740 (diffs, comment 488385416)
• Remove any other unnecessary downstream changes due to this tech debt
• Search for https://gitlab.com/gitlab-org/gitlab/-/issues/232917 in the codebase, and remove/address each instance
• Search for log_geo_deleted_event in the codebase, and remove/address each instance