chore(MessageBar): roll back deprecations of MessageBarTransitionContext

- based on code review

packages/react-components/react-message-bar/library/etc/react-message-bar.api.md

@@ -144,13 +144,13 @@ export type MessageBarTitleSlots = {
 // @public
 export type MessageBarTitleState = ComponentState<MessageBarTitleSlots>;
 
-// @internal @deprecated (undocumented)
+// @internal (undocumented)
 export const messageBarTransitionContextDefaultValue: MessageBarTransitionContextValue;
 
-// @internal @deprecated
+// @internal
 export const MessageBarTransitionContextProvider: React_2.Provider<MessageBarTransitionContextValue | undefined>;
 
-// @public @deprecated (undocumented)
+// @public (undocumented)
 export type MessageBarTransitionContextValue = {
     className: string;
     nodeRef: React_2.Ref<HTMLDivElement | null>;
@@ -210,7 +210,7 @@ export const useMessageBarTitle_unstable: (props: MessageBarTitleProps, ref: Rea
 // @public
 export const useMessageBarTitleStyles_unstable: (state: MessageBarTitleState) => MessageBarTitleState;
 
-// @internal @deprecated (undocumented)
+// @internal (undocumented)
 export const useMessageBarTransitionContext: () => MessageBarTransitionContextValue;
 
 // (No @packageDocumentation comment for this package)

packages/react-components/react-message-bar/library/src/contexts/messageBarTransitionContext.ts

@@ -1,9 +1,9 @@
 import * as React from 'react';
 
-/**
- * @deprecated Code is unused, replaced by motion components
- */
 export type MessageBarTransitionContextValue = {
+  /**
+   * @deprecated CSS className is no longer used for this transition, replaced by motion components
+   */
   className: string;
   nodeRef: React.Ref<HTMLDivElement | null>;
 };
@@ -12,22 +12,19 @@ const messageBarTransitionContext = React.createContext<MessageBarTransitionCont
 
 /**
  * @internal
- * @deprecated Code is unused, replaced by motion components
  */
 export const messageBarTransitionContextDefaultValue: MessageBarTransitionContextValue = {
   className: '',
   nodeRef: React.createRef<HTMLDivElement | null>(),
 };
 
 /**
- * Context to pass animation className to MessageBar components
+ * Context to pass nodeRef for animation to MessageBar components
  * @internal
- * @deprecated Code is unused, replaced by motion components
  */
 export const MessageBarTransitionContextProvider = messageBarTransitionContext.Provider;
 /**
  * @internal
- * @deprecated Code is unused, replaced by motion components
  */
 export const useMessageBarTransitionContext = () =>
   React.useContext(messageBarTransitionContext) ?? messageBarTransitionContextDefaultValue;