Fix more yaml lint errors (#27284)

Fix #27268

.yamllint.yaml

@@ -44,5 +44,3 @@ rules:
 ignore: |
   .venv
   node_modules
-  /models/fixtures
-  /models/migrations/fixtures

models/fixtures/access.yml

@@ -135,4 +135,3 @@
   user_id: 31
   repo_id: 28
   mode: 4
-

models/fixtures/review.yml

@@ -150,6 +150,7 @@
   content: "review approved by user20"
   updated_unix: 946684833
   created_unix: 946684833
+
 -
   id: 18
   type: 4
@@ -169,4 +170,3 @@
   content: "review request for user15"
   updated_unix: 946684835
   created_unix: 946684835
-

models/migrations/fixtures/Test_DeleteOrphanedIssueLabels/issue_label.yml

@@ -26,4 +26,3 @@
   id: 5
   issue_id: 2
   label_id: 87
-

models/migrations/fixtures/Test_RemoveInvalidLabels/label.yml

@@ -23,4 +23,3 @@
   id: 5
   repo_id: 3
   org_id: 0
-

models/migrations/fixtures/Test_StoreWebauthnCredentialIDAsBytes/webauthn_credential.yml

@@ -28,4 +28,3 @@
   attestation_type: 'fido-u2f'
   sign_count: 1
   clone_warning: false
-