Revert "Workaround for border-radius due to bug 49074"

This reverts commit 979c2da4188db3a4ad8010ff41fd8805de659743

Will not be necessary after I22bc777b is merged in core.

Bug: 49074
Change-Id: Iac9e78b845c270cbdf36e982d5c7feb697e39a9a