Revert "crosutils: Symlink test_image script to chromite/scripts/test_image"

This reverts commit 2792ceff76f93c7efe1c4fa2ecee84fc1730109c.

Should have gone through normal review w/build team.

BUG=chromium:382708
TEST=None

Change-Id: I8c62b23d4bb3010bcb23dbc310377479c57c5463
Reviewed-on: https://chromium-review.googlesource.com/203767
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/test_image b/test_image
deleted file mode 120000
index 34b5d68..0000000
--- a/test_image
+++ /dev/null
@@ -1 +0,0 @@
-../../chromite/scripts/test_image
\ No newline at end of file