[DO NOT MERGE] Removing activate script to clean up buildbots

[zooba]

To clean up the buildbots after #103088, going to run a build with this file missing. Then it should get brought back with correct endings for the next build.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @zooba for commit c4420f8 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @zooba for commit c4420f8 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.