Remove this worthless callback that has a bug

I can find no evidence of people using it, and it has the same defect as #3055

packages/design-system/src/components/Dialog/Dialog.tsx

@@ -57,10 +57,6 @@ export interface BaseDialogProps extends AnalyticsOverrideProps {
    * Controls whether the dialog is in an open state
    */
   isOpen?: boolean;
-  /**
-   * This function is called after the modal opens
-   */
-  onEnter?(): void;
   /**
    * Called when the user triggers an exit event, like by clicking the close
    * button or pressing the ESC key. The parent of this component is
@@ -96,7 +92,6 @@ export const Dialog = (props: DialogProps) => {
     headerClassName,
     heading,
     id,
-    onEnter,
     onExit,
     size,
     ...modalProps
@@ -113,10 +108,6 @@ export const Dialog = (props: DialogProps) => {
 
   const containerRef = useRef<HTMLDivElement>();
 
-  useEffect(() => {
-    if (onEnter) onEnter();
-  }, []);
-
   // Set initial focus
   useEffect(() => {
     containerRef.current?.focus();

tests/browser/snapshots/storybook-docs/Docs-Components-Dialog-Docs-prop-table-matches-snapshot-1.txt

@@ -69,11 +69,6 @@
     "Optional callback that will intercept analytics events for this component. If none is specified, the design system will use the default analytics function, which can be overwritten globally with the defaultAnalyticsFunction config property.\n\n(event: AnalyticsEvent) => void",
     "-"
   ],
-  [
-    "onEnter",
-    "This function is called after the modal opens\n() => void",
-    "-"
-  ],
   [
     "onExit*",
     "Called when the user triggers an exit event, like by clicking the close button or pressing the ESC key. The parent of this component is responsible for showing or not showing the dialog, so you need to use this callback to make that happen. The dialog does not hide or remove itself.\n\n(event: MouseEvent<Element, MouseEvent> | KeyboardEvent<Element>) => void",