To the right of your post is a list of "Actions." If there are no responses to your post, you can pick "delete."
If there are one or more posts, you can't delete it.
A moderator might be able to help you if you have some personal content you want deleted.
How do I contact the moderator?
Find an employee in a message, noted by STAFF, and hover your mouse over their name
you may then click the Message option in the popup window to send a private email
Jive Forum Getting Started https://forums.adobe.com/docs/DOC-7042
-and Forum Help https://forums.adobe.com/community/forumhelp
User Manual for the Adobe Community (the forums) https://forums.adobe.com/docs/DOC-4714