Rename Node->destroy

[ezyang]

Rename Node->destroy

[zdevito]

It was originally called eraseFromParent, from LLVM. Maybe it had that weird name in LLVM for a reason.

[ezyang]

Another possibility is to make destroy take an iterator reference. Then if the iterator points at the thing you want to destroy, it will instead fix the iterator. I saw myself writing this:

      JIT_ASSERT(rhs->uses().size() == 1);
      // TODO: This is awful!  See https://github.com/ezyang/pytorch/issues/254
      if (*it == rhs_select) {
        it.destroyCurrent();
      } else {
        rhs_select->destroy();
      }
      if (*it == rhs) {
        it.destroyCurrent();
      } else {
        rhs->destroy();
      }