onReactionRemoved emits reactions removed from visible Slack messages, files,
or file comments.
Example
automations/handle-slack-revocation.automation.ts
Options
account?: string | IntegrationAccountReference<"slack"> is a static workspace
binding and defaults to the project binding. Signals cannot select trigger
accounts.
Trigger data
ReturnseventTimestamp, workspaceId, emoji reaction, acting userId,
optional itemUserId, and item. The item is a message
(conversationId, messageTimestamp, optional conversationType), file
(fileId), or file comment (fileId, fileCommentId), discriminated by type.