Remove HostIrLower::canLower as it's no longer used

[wujingyue]

Follow-up to #4552 (comment)

[github-actions]

Review updated until commit 9b4eac3

Description

• Remove unused HostIrLower::canLower function

• Update tests to be more realistic

• Improve test coverage by using MultiDeviceTest

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Changes walkthrough 📝

	Relevant files
Enhancement	lower.cpp Remove unused function and update tests                                    csrc/host_ir/lower.cpp Removed HostIrLower::canLower function Updated test cases to use MultiDeviceTest +0/-38    lower.h Remove function declaration                                                            csrc/host_ir/lower.h Removed declaration of HostIrLower::canLower +0/-5

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🧪 No relevant tests

⚡ Recommended focus areas for review Possible Issue The removal of canLower might lead to issues in places where this function was previously used. Ensure that all calls to canLower have been appropriately handled or removed. namespace nvfuser { bool HostIrLower::isLowerableAsStandaloneHostOp(Expr* expr) { Documentation The comment about ignore_inner_resharding in the header file should be updated or removed to reflect the changes made in the PR. class HostIrLower { public: explicit HostIrLower(const HostIrLowerParams& params = HostIrLowerParams())

[wujingyue]

!build

[wujingyue]

!build