Reduce the size of codebase

[yecol]

Our codebase has gained to (CRAZY) 2.5G, with a single git clone. Need to reduce the size, urgently.

[luoxiaojian]

After testing, graph-learn is the largest part. By completely removing the graph-learn submodule, the repository's size will be reduced to approximately 450MB. Therefore, it might be considered to appropriately reduce the number of files under graph-learn, such as the grpc submodule within it.

[yecol]

Is that possible to drop the submodule of legacy GL? As our development and maintenance focused on GL-PyG @LiSu

[LiSu]

We are working on supporting multi-server training using GLTorch in GraphScope now, after that it should be OK to deprecate GL from GraphScope. @yecol

[github-actions[bot]]

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