Remove the isTVOS check (#34071)

Summary:
Removes the `isTVOS` check, which just duplicated and returned the `isTV` check anyway.

## Changelog

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[General] [Removed] - Remove deprecated `isTVOS` constant.

Pull Request resolved: #34071

Test Plan: Run against CI, and apply changes as needed.

Reviewed By: cipolleschi

Differential Revision: D37434978

Pulled By: cortinico

fbshipit-source-id: 2b38253125251b0ce28cf10c88471d8f16704999

Libraries/Utilities/Platform.ios.js

@@ -47,13 +47,6 @@ const Platform = {
   get isPad(): boolean {
     return this.constants.interfaceIdiom === 'pad';
   },
-  /**
-   * Deprecated, use `isTV` instead.
-   */
-  // $FlowFixMe[unsafe-getters-setters]
-  get isTVOS(): boolean {
-    return Platform.isTV;
-  },
   // $FlowFixMe[unsafe-getters-setters]
   get isTV(): boolean {
     return this.constants.interfaceIdiom === 'tv';