Javascript exception on the new meeting prep message screen

[robby1066]

Describe the bug

There appears to be a stray reference to the introduction-item stimulus controller on the meeting prep message page.

It doesn't seem to affect the functionality of the page, but it is throwing an error in the console.

Steps To Reproduce

1. Go to /messages/meeting_prep
2. See the error that shows in the console.

Expected behavior

There should be no errors in the console.

Screenshots

[robby1066]

This one was fortunately really easy. The introduction item (now deprecated message type) was erroneously referenced on the meeting prep page. Just removed it and the errors went away.

Confirmed that the errors weren't blocking functionality, either.