Remove `GTF_REVERSE_OPS` from LIR. (#10698)

In HIR, this flag indicates that the second operand to a binary node will execute before
the node's first operand. LIR, however, no longer determines ordering via use edges, so
this flag only affects the order in which operands to a node are considered. The sole
constraint on this use ordering is that for a given node, the same ordering must be used
in liveness, LSRA, and the code generator; this is due to the correspondence between
use ordering and spill/reload/last-use ordering. As a result, the reverse ops flag is
unnecessary and rather unhelpful in LIR, causing little more than a bit of extra complexity
throughout the backend.

This change removes `GTF_REVERSE_OPS` from LIR by clearing this flag during rationalize
and verifying that it remains clear in `LIR::CheckLIR`. We could reuse this bit for an
additional backend-specific purpose in the future with a bit more work in the checker.

0 files changed, 0 insertions, 0 deletions