sel-sched-ir.c (maybe_tidy_empty_bb): Simplify comment.

sel-sched-ir.c (maybe_tidy_empty_bb): Simplify comment.

        * sel-sched-ir.c (maybe_tidy_empty_bb): Simplify comment.
        (tidy_control_flow): Tidy vertical space.
        (sel_remove_bb): New variable idx.  Use it to remember the basic
        block index before deleting the block.
        (sel_remove_empty_bb): Remove dead code, simplify and insert to ...
        (sel_merge_blocks): ... here.
        * sel-sched-ir.h (sel_remove_empty_bb): Remove prototype.

From-SVN: r165453