R1:93c9afd2f387

Do not add actor as subscriber when removing a comment

Summary:
When an admin removes a comment (e.g. spam), the admin gets subscribed to the task. This is usually unwanted as the removal action does not imply that the admin is interested in receiving future notifications about the task, in contrast to e.g. adding a comment to a discussion in the task.

Any transaction of a comment (add, edit, remove) is a `"core:comment"` action. The code calls `applyImplicitCC()` which calls `shouldImplyCC()` which…