Revert "Add a trivial kotlin test to LibcoreCtsTestCases."

This reverts commit a5c14e28ec5c3ec6014c1d0d7de6a0b8d40e5c6f.

Reason for revert: No longer needed.

Bug: 73281388
Test: Treehugger
Change-Id: Ifbfe2905b23431ea1f9ef8950451ee911593955d
3 files changed