Tests generate "deleting unreachable code" note in SBCL

SBCL prints this note in 12 tests.  A macro expansion shows that everything looks OK, and the tests appear to run (by the counts returned from CLUNIT), but it would be nice to fix this.

This might be a bug in SBCL, as there are several levels of macro expansion here, or it may be a problem with the tests.  One clue is that they are all generated from indexing functions.