feat[next][dace]: Build clean nestedSDFG without unused data connectors #1628
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The main objective of this PR is to reduce the GT4Py dependency on DaCe (especially on DaCe transformations) to produce clean SDFGs. Instead of relying on the
PruneConnectors
pass to remove unused data connectors in nested SDFGs, these connectors can be avoided in the first place, when lowering let-lambdas to nested SDFGs.