Remove anthropic_usage_and_costs and authorize_net, now in integrations-internal-core (#25933)

Removes anthropic_usage_and_costs and authorize_net, which now live in integrations-internal-core, along with their CODEOWNERS and labeler entries.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: tkell

.github/CODEOWNERS

@@ -261,12 +261,6 @@ datadog_checks_base/datadog_checks/base/checks/windows/              @DataDog/wi
 /adyen/manifest.json                                                 @DataDog/saas-integrations @DataDog/documentation
 /adyen/assets/logs/                                                  @DataDog/saas-integrations @DataDog/documentation @DataDog/logs-integrations-reviewers
 
-/authorize_net/                                                      @DataDog/saas-integrations
-/authorize_net/*.md                                                  @DataDog/saas-integrations @DataDog/documentation
-/authorize_net/manifest.json                                         @DataDog/saas-integrations @DataDog/documentation
-/authorize_net/metadata.csv                                          @DataDog/saas-integrations @DataDog/documentation
-/authorize_net/assets/logs/                                          @DataDog/saas-integrations @DataDog/documentation @DataDog/logs-integrations-reviewers
-
 /brevo/                                                              @DataDog/saas-integrations
 /brevo/*.md                                                          @DataDog/saas-integrations @DataDog/documentation
 /brevo/manifest.json                                                 @DataDog/saas-integrations @DataDog/documentation

.github/workflows/config/labeler.yml

@@ -105,10 +105,6 @@ integration/anthropic:
 - changed-files:
   - any-glob-to-any-file:
     - anthropic/**/*
-integration/anthropic_usage_and_costs:
-- changed-files:
-  - any-glob-to-any-file:
-    - anthropic_usage_and_costs/**/*
 integration/anyscale:
 - changed-files:
   - any-glob-to-any-file:
@@ -145,10 +141,6 @@ integration/aspdotnet:
 - changed-files:
   - any-glob-to-any-file:
     - aspdotnet/**/*
-integration/authorize_net:
-- changed-files:
-  - any-glob-to-any-file:
-    - authorize_net/**/*
 integration/automox:
 - changed-files:
   - any-glob-to-any-file: