Revert "AMDGPU: Add scheduling test for gfx940 (#83220)"
This reverts commit f0484e08bdcf64106592808e3ca80404937b4657.
Reason: Broke the sanitizer build bots. See the github comments on
https://github.com/llvm/llvm-project/commit/f0484e08bdcf64106592808e3ca80404937b4657
for more information
