[infra] Remove auto_apply_labels option from .coderabbit.yaml reviews section (#6416)

Signed-off-by: Venky <[email protected]>

Author: venkywonka

.coderabbit.yaml

@@ -27,7 +27,6 @@ reviews:
   related_issues: true
   related_prs: true
   suggested_labels: true
-  auto_apply_labels: true
   suggested_reviewers: true
   auto_assign_reviewers: true
   poem: false