Revert "Add rust_test modules."

This reverts commit 7a8a8536f66e2a14e4619df25f07946a0b12ca3d.

Reason for revert: b/144553403 Broken build on git_master-without-vendor on sdk_mac

Change-Id: I8f3dfa893e7f3a82026719283213aa7abfb3e368

Bug: 144553403
3 files changed