Remove TODO comments and convert them to issues (#7743)

* Remove TODO comment and convert to an issue for react-test-renderer

* Remove TODO comment and convert to an issue for react-dom/test-utils

Author: BartoszKlonowski

src/content/warnings/react-dom-test-utils.md

@@ -2,8 +2,6 @@
 title: react-dom/test-utils Deprecation Warnings
 ---
 
-TODO: update for 19?
-
 ## ReactDOMTestUtils.act() warning {/*reactdomtestutilsact-warning*/}
 
 `act` from `react-dom/test-utils` has been deprecated in favor of `act` from `react`.

src/content/warnings/react-test-renderer.md

@@ -2,8 +2,6 @@
 title: react-test-renderer Deprecation Warnings
 ---
 
-TODO: Update this for 19?
-
 ## ReactTestRenderer.create() warning {/*reacttestrenderercreate-warning*/}
 
 react-test-renderer is deprecated. A warning will fire whenever calling ReactTestRenderer.create() or ReactShallowRender.render(). The react-test-renderer package will remain available on NPM but will not be maintained and may break with new React features or changes to React's internals.