Yes, you can remove leads from a campaign. In the campaign's lead table, select the checkbox next to the leads you want to remove, then bulk delete them.
If you need any more help with managing users in your campaign, please let me know. Would you like to provide more details about what you're trying to accomplish?
If you still need assistance with managing users in your sequencer campaign, I’m here to help. Would you like to share more about what you’re trying to resolve or understand?