Unify ESLint and Prettier across xplat/yoga (#1335)

Summary: Pull Request resolved: https://github.com/facebook/yoga/pull/1335

Reviewed By: christophpurrer

Differential Revision: D47459866

fbshipit-source-id: a583da91ea0f3c6a01917edc5ecf57eb177b2544

.github/workflows/validate-cpp.yml

@@ -64,5 +64,3 @@ jobs:
 
       - name: clang-format
         uses: ./.github/actions/clang-format
-        with:
-          directory: ./yoga