Since the compiler now refuses to allow debugging in parallel grades,
tests that require debugging need to be skipped over in low-level
parallel grades or deleted.
tests/hard_coded/Mmakefile:
Disable 'parse' test in parallel grades as it happens to link with
debug libraries.
tests/par_conj/Mercury.options:
tests/par_conj/Mmakefile:
tests/par_conj/par_ddeath.exp:
tests/par_conj/par_ddeath.m:
tests/par_conj/par_ddeath_2.exp:
tests/par_conj/par_ddeath_2.m:
Delete par_ddeath and par_ddeath_2 tests that once triggered a
compiler abort with --trace deep in parallel grades.
I don't think there is much value in keeping them around.
tests/valid/Mmake.valid.common:
Skip LLDS_PROGS (i.e. test cases that required debugging) in
parallel grades.
tests/valid/Mercury.options:
tests/valid/Mmakefile:
tests/valid/untuple_bug.m:
Delete untuple_bug. It tests an old bug in the untupling
transformation, which was more a programming exercise than something
that should be used anyway.