Revert "Pin back Synapse used in Cypress to alleviate test failures" (#9430)
Revert "Pin back Synapse used in Cypress to alleviate test failures" (#9430)

This reverts commit cf029c51dc466db448c7324d3dda1fa484a9f3ee.
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk