Stale action re-configure (still just debug mode) (#21783)

* Remove old stale bot yaml file

* Remove slack svg file (unused)

* Stale action: Only apply stale label, and no other actions

Respecting the opinion on
https://github.com/PX4/PX4-Autopilot/commit/fa9ac6ecf651232f3105ca124a2d2c54ab8620d0,
it seems reasonable to disable commenting feature, and just keep the
action only applying the `stale` label. This will reduce the noise /
email spams / ping pong fight with the stale bot (Action)

.github/slack.svg

@@ -1,24 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="90" height="20">
-  <linearGradient id="smooth" x2="0" y2="100%">
-    <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
-    <stop offset="1" stop-opacity=".1"/>
-  </linearGradient>
-
-  <mask id="round">
-    <rect width="90" height="20" rx="3" fill="#fff"/>
-  </mask>
-
-  <g mask="url(#round)">
-    <rect width="42" height="20" fill="#555"/>
-    <rect x="42" width="48" height="20" fill="#E01563"/>
-    <rect width="90" height="20" fill="url(#smooth)"/>
-  </g>
-
-  <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
-    <text x="22" y="15" fill="#010101" fill-opacity=".3">slack</text>
-    <text x="22" y="14">slack</text>
-    <text x="65" y="15" fill="#010101" fill-opacity=".3">Join us!</text>
-    <text x="65" y="14">Join us!</text>
-  </g>
-</svg>
-

.github/stale.yml

@@ -1,15 +0,0 @@
-# Number of days of inactivity before an issue becomes stale
-daysUntilStale: 90
-# Number of days of inactivity before a stale issue is closed, or `false` to disable
-daysUntilClose: false
-# Issues with these labels will never be considered stale
-exemptLabels:
-  - pinned
-# Label to use when marking an issue as stale
-staleLabel: stale
-# Comment to post when marking an issue as stale. Set to `false` to disable
-markComment: >
-  This issue has been automatically marked as stale because it has not had
-  recent activity. Thank you for your contributions.
-# Comment to post when closing a stale issue. Set to `false` to disable
-closeComment: false

.github/workflows/stale.yml

@@ -1,4 +1,4 @@
-name: 'Close stale issues and PRs'
+name: 'Handle stale issues and PRs'
 on:
   schedule:
     - cron: '30 1 * * *'
@@ -9,12 +9,11 @@ jobs:
     steps:
       - uses: actions/stale@v4.1.1
         with:
-          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
-          stale-pr-message: 'This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.'
-          close-issue-message: 'This issue was closed because it has been stalled for 5 days with no activity.'
-          close-pr-message: 'This PR was closed because it has been stalled for 10 days with no activity.'
           days-before-issue-stale: 30
-          days-before-pr-stale: 45
+          stale-issue-label: 'stale'
-          days-before-issue-close: 5
+
-          days-before-pr-close: 10
+          days-before-pr-stale: 30
+          stale-pr-label: 'stale'
+
+          remove-stale-when-updated: true
           debug-only: true