[RFCLAT#7] clatd_test: remove dead test for configure_tun_ip am: 45b2f7c3c5

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/1903812

Change-Id: I823f22ca64ccd7a030f7c9b6a6fa980f7f3d0d46