Update stale.yml

Remove label: stat:awaiting response for TFML repo , we will default to empty labels while we search for stale issues.

BUG=cleanup

.github/stale.yml

@@ -2,9 +2,6 @@
 daysUntilStale: 30
 # Number of days of inactivity before a stale Issue or Pull Request is closed
 daysUntilClose: 15
-# Only issues or pull requests with all of these labels are checked if stale. Defaults to `[]` (disabled)
-onlyLabels:
- - stat:awaiting response
 # Comment to post when marking as stale. Set to `false` to disable
 markComment: >
   This issue has been automatically marked as stale because it has no