Revert "Document and tests reply behavior"

This reverts commit 0158c13484.

README.md

@@ -64,7 +64,6 @@ or
   env:
     SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
 ```
-
 or
 
 > If the `payload` is provided it will take preference over `payload-file-path`
@@ -212,37 +211,6 @@ Please note that **the message update step does not accept a channel name.** Set
     SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
 ```
 
-#### Reply to a message
-
-If you want to post a message as a reply, you can populate the `payload` with a `"thread_ts"` field. The steps after the first message posting can have `"thread_ts": "${{ steps.slack.outputs.ts }}"` in their payload. In order to reply to an existing message.
-
-Please note that **that reply to a message does not accept a channel name.** Set a channel ID for the actions that reply to messages in thread.
-
-```yaml
-- id: slack
-  uses: slackapi/[email protected]
-  with:
-    channel-id: "CHANNEL_ID"
-    payload: |
-      {
-        "text": "Deployment started (In Progress)"
-      }
-  env:
-    SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
-- uses: slackapi/[email protected]
-  with:
-    # Unlike the step posting a new message, this step does not accept a channel name.
-    # Please use a channel ID, not a name here.
-    channel-id: "CHANNEL_ID"
-    payload: |
-      {
-        "thread_ts": "${{ steps.slack.outputs.ts }}"
-        "text": "Deployment finished (Completed)",
-      }
-  env:
-    SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
-```
-
 ### Technique 3: Slack Incoming Webhook
 
 This approach allows your GitHub Actions job to post a message to a Slack channel or direct message by utilizing [Incoming Webhooks](https://api.slack.com/messaging/webhooks).

test/slack-send-test.js

@@ -143,53 +143,6 @@ describe('slack-send', () => {
         assert.equal(firstChatArgs.text, 'who let the dogs out?', 'Correct message provided to postMessage with first comma-separated channel');
         assert.equal(secondChatArgs.text, 'who let the dogs out?', 'Correct message provided to postMessage with second comma-separated channel');
       });
-
-      it("should send a reply-message using the postMessage API if thread_ts payload field is used'", async () => {
-        fakeCore.getInput
-          .withArgs('payload')
-          .returns('{"thread_ts":"123456","text":"who let the dogs out?"}');
-        fakeCore.getInput.withArgs('channel-id').returns('C123456');
-        await slackSend(fakeCore);
-        assert.equal(
-          fakeCore.setOutput.firstCall.firstArg,
-          'ts',
-          'Output name set to ts',
-        );
-        assert.equal(
-          fakeCore.setOutput.secondCall.firstArg,
-          'thread_ts',
-          'Output name set to thread_ts',
-        );
-        assert(
-          fakeCore.setOutput.secondCall.lastArg.length > 0,
-          'Time output a non-zero-length string',
-        );
-        assert.equal(
-          fakeCore.setOutput.lastCall.firstArg,
-          'time',
-          'Output name set to time',
-        );
-        assert(
-          fakeCore.setOutput.lastCall.lastArg.length > 0,
-          'Time output a non-zero-length string',
-        );
-        const chatArgs = ChatStub.postMessage.lastCall.firstArg;
-        assert.equal(
-          chatArgs.channel,
-          'C123456',
-          'Correct channel provided to postMessage',
-        );
-        assert.equal(
-          chatArgs.thread_ts,
-          '123456',
-          'Correct thread_ts provided to postMessage',
-        );
-        assert.equal(
-          chatArgs.text,
-          'who let the dogs out?',
-          'Correct message provided to postMessage',
-        );
-      });
     });
     describe('sad path', () => {
       it('should set an error if payload cannot be JSON parsed', async () => {