BUG: Remove @close on ConfirmDialog

[SethSharp]

The @close event is not emitted from the DialogContent component, this would cause a warning in the console.

Extraneous non-emits event listeners (close) were passed to component but could not be automatically inherited because component renders fragment or text root nodes

Without the @close handler, the dialog can still be closed via other emitted events escape-key-down and pointer-down-outside.