Remove test for -fcoroutines-ts am: 4b737c774c am: ee86e3b189 am: f64785da5e am: f0f3731891

Original change: https://android-review.googlesource.com/c/platform/external/libcxx/+/2620093

Change-Id: I925dbcf4e345f569c57973fe6303d19927ac8426
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>