Remove reactComponentExpect (#9856)

Legacy.

Author: sophiebits

scripts/fiber/tests-passing.txt

@@ -2004,10 +2004,3 @@ src/shared/utils/__tests__/PooledClass-test.js
 
 src/shared/utils/__tests__/reactProdInvariant-test.js
 * should throw with the correct number of `%s`s in the URL
-
-src/test/__tests__/reactComponentExpect-test.js
-* should match composite components
-* should match empty DOM components
-* should match non-empty DOM components
-* should match DOM component children
-* should detect text components

scripts/rollup/packaging.js

@@ -19,7 +19,6 @@ const RN_PROD = Bundles.bundleTypes.RN_PROD;
 const facebookWWW = 'facebook-www';
 // these files need to be copied to the facebook-www build
 const facebookWWWSrcDependencies = [
-  'src/test/reactComponentExpect.js',
   'src/renderers/dom/shared/eventPlugins/TapEventPlugin.js',
 ];