gluebuddy: Remove deleted project bots

The behavior is mentioned in the documentation[1], but gitlab has not
always done it this way (e.g. some of the older project bots still
exist, even though the project tokens expired several months ago).

[1] https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html#bot-users-for-projects

roles/gluebuddy/defaults/main.yml

@@ -4,8 +4,6 @@ gitlab_bots:
   - project_10185_bot2
   - project_19591_bot
   - project_19796_bot
-  - project_57011_bot_12149c4ff92f18dd46696e89f2f3e703
-  - project_57074_bot_740552e9ac20aea79fd0f9d34e757397
   - project_10185_bot_6f3a8a11922b9008fcb92024361b10b6
   - project_19709_bot_ab88a35474b62399f347877ec82018ac
   - group_11323_bot_c1f9e22ef6391b32e45f7e4a135ecc91