Revert "Allow large array operation in MXNet (#348)"

[azai91]

This reverts commit d68d369.

This does not build as tvm nnvm::NodeEntry cannot accept input. tvm needs to be updated first.

[szha]

@apeforest @tqchen

[tqchen]

I believe this change have nothing to do nnvm::NodeEntry data type

[szha]

I believe @azai91 meant compilation-errors like this http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/incubator-mxnet/detail/PR-12674/1/pipeline

[tqchen]

Unfortunately, I do feel these are warnings that need to be fixed in the corresponding code (because loop variable index_t is being used).

We could monkey patch the index of NodeEntry to int64_t, that will, however, increase the space requirement by 3 * 4 bytes and looks like a temporary solution just to suppress these warnings

[szha]

@apeforest could you propose the patch again, fix the problems and merge it into mxnet?

[apeforest]

@szha Sure, I will submit the PR again together with the change in MXNet so it will not break MXNet. I do have a PR (apache/mxnet#11742) in MXNet but I am currently fixing a unit test failure in GPU.