Revert^2 "Add reference processor tests""

This reverts commit bcf7ef1253691af61dab4062a358a2b903704d45.

Reason for revert: Land corrected version

PS1 is identical to aosp/1952438 .
PS3:
    Moves timeUnreachable into a nested function to avoid accidentally
    retained references.
    Disables "debuggable" runs of 2042-reference-processing, which
    sometimes take too long, since "debuggable" currrently disables use
    of AOT code. Further, test runs often combine it with "poison" which
    currently disables the fast interpreter.

Bug: 190867430
Bug: 189738006
Bug: 211784084

Test: Passes on host, Treehugger

Change-Id: I21d29158d0bc4c738fbf4c3f7c7ca881ae8b874b
diff --git a/test/2042-reference-processing/expected-stdout.txt b/test/2042-reference-processing/expected-stdout.txt
new file mode 100644
index 0000000..8b3e832
--- /dev/null
+++ b/test/2042-reference-processing/expected-stdout.txt
@@ -0,0 +1,2 @@
+Starting
+Finished