[llvm] [Github] Delete issue-write-test workflow (PR #173404)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-github-workflow

Author: Aiden Grossman (boomanaiden154)

<details>
<summary>Changes</summary>

This workflow never actually tested changes to the issue write workflow
because changes to issue-write.yml need to be committed to main before
they do anything.

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Full diff: https://github.com/llvm/llvm-project/pull/173404.diff


1 Files Affected:

- (removed) .github/workflows/issue-write-test.yaml (-33) 


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</details>


https://github.com/llvm/llvm-project/pull/173404