ci: remove stale bot configuration

This commit removes the stale bot
configration as stale bot repo is not actively
maintained anymore.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

.github/stale.yml

@@ -1,45 +0,0 @@
-# Configuration for probot-stale - https://github.com/probot/stale
-
-# Issues or Pull Requests with these labels will never be
-# considered stale. Set to `[]` to disable
----
-exemptLabels:
-  - keepalive
-  - security
-  - reliability
-  - release requirement
-
-# Set to true to ignore issues in a project (defaults to false)
-exemptProjects: false
-
-# Set to true to ignore issues in a milestone (defaults to false)
-exemptMilestones: true
-
-# Label to use when marking as stale
-staleLabel: wontfix
-
-# Limit the number of actions per hour, from 1-30. Default is 30
-limitPerRun: 5
-
-# Specify configuration settings that are specific to issues
-issues:
-  daysUntilStale: 90
-  daysUntilClose: 7
-  markComment: >
-    This issue has been automatically marked as stale because it has not had
-    recent activity. It will be closed in a week if no further activity occurs.
-    Thank you for your contributions.
-  closeComment: >
-    This issue has been automatically closed due to inactivity. Please re-open
-    if this still requires investigation.
-# Specify configuration settings that are specific to PRs
-pulls:
-  daysUntilStale: 60
-  daysUntilClose: 30
-  markComment: >
-    This pull request has been automatically marked as stale because it has not
-    had recent activity. It will be closed in a month if no further activity
-    occurs. Thank you for your contributions.
-  closeComment: >
-    This pull request has been automatically closed due to inactivity. Please
-    re-open if these changes are still required.