GitLab

* simplify shared memory graph index.

* fix.

* remove edge_dir in SharedMemGraphStore.

* avoid creating shared-mem graph store with from_csr.

* simplify from_csr.

* add comments.

* fix lint.

* remove the test.

* fix compilation error.

* fix a bug.

* fix a bug.
Co-authored-by: Ubuntu <ubuntu@ip-172-31-16-150.us-west-2.compute.internal>