[TorchScript] Explicitly disallow del with more than 1 operand. (#38089)
Summary:
del in python supports multiple operands, but PyTorch c++ frontend doesn't support that. To be consistent across different frontends, we decided to throw an exception when finding del with multiple operands inside torchscript.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38089
Test Plan: Unit tests in test/jit/test_builtins.py
Differential Revision: D21478900
Pulled By: SplitInfinity
fbshipit-source-id: 1cbd61301680c5d6652ef104996178cefcdd3716