ruby: .owlbot.rb workarounds for Spurious Links to Google::Cloud::Location are obsolete

[suztomo]

The replacement targets of .owlbot.rb's content.gsub for Google::Cloud::Location cross-references do not exist anymore after the upstream generator bug fix in gapic-generator-ruby#1211 (included in gapic-generator-cloud >= 0.51.0). Consequently, these .owlbot.rb scripts are obsolete and no longer needed when onboarding libraries to Librarian.

Background

Historically, gapic-generator-ruby converted markdown links to Google::Cloud::Location classes (such as [google.cloud.location.Location][google.cloud.location.Location]) into YARD cross-reference links ({::Google::Cloud::Location::Location google.cloud.location.Location}). Because Google::Cloud::Location is defined in an external dependency gem (google-cloud-location), YARD could not resolve the link within the gem's local docs, causing YARD doc builds to fail (gapic-generator-ruby#824).

To work around this, multiple gems maintained custom .owlbot.rb modifiers using content.gsub to replace {::Google::Cloud::Location...} with `::Google::Cloud::Location...`.

Current Generator & Librarian Behavior

1. In gapic-generator-ruby PR #1211, Gapic::Model::Mixins.mixin_message_field_address? was introduced in gapic-generator/lib/gapic/formatting_utils.rb to prevent emitting invalid YARD {...} links for cross-package mixin objects.
2. The generator no longer outputs {::Google::Cloud::Location::Location ...}. Instead, it leaves the proto reference without invalid YARD formatting.
3. When regenerating libraries with librarian generate, toys ci --test --rubocop --doctest and bundle exec yard doc --fail-on-warning pass cleanly without needing any .owlbot.rb post-processing.
4. As part of Librarian onboarding, these .owlbot.rb files, along with .OwlBot.yaml and .owlbot-manifest.json, are removed.

Affected Gem Folders

The following 14 gems have .owlbot.rb workarounds for Google::Cloud::Location (Issue 824):

• google-cloud-discovery_engine-v1
• google-cloud-edge_container-v1
• google-cloud-firestore-admin-v1
• google-cloud-kms-v1
• google-cloud-memcache-v1
• google-cloud-memcache-v1beta2
• google-cloud-netapp-v1
• google-cloud-oracle_database-v1
• google-cloud-scheduler-v1
• google-cloud-scheduler-v1beta1
• google-cloud-tasks-v2
• google-cloud-tasks-v2beta2
• google-cloud-tasks-v2beta3
• google-cloud-vmware_engine-v1