Remove test for -fcoroutines-ts am: 4b737c774c am: ee86e3b189 am: f64785da5e am: f0f3731891 am: e5416d60d4

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

Change-Id: Id9afd3c9ecaceed925fa4e474a8b17a4c7ed1003
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>