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Kristiyan Kostadinov b362344cc1 build: remove unnecessary polyfills from tests (#42567)
Removes the polyfills for `MutationObserver` and `setPrototypeOf` from our testing setup, because none of the browsers that we support require them. It also removes a bit of code and one external dependency.

PR Close #42567
2021-06-14 14:14:41 -07:00

9.4 KiB