[llvm] ci: Temporarily disable the buildkite job on Windows (PR #81538)

[Louis Dionne via llvm-commits]

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@@ -233,7 +233,9 @@ linux_projects=$(add-dependencies ${linux_projects_to_test} | sort | uniq)
 
 windows_projects_to_test=$(exclude-windows $(compute-projects-to-test ${modified_projects}))
 windows_check_targets=$(check-targets ${windows_projects_to_test} | sort | uniq)
-windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
+# Temporary disable the windows job.
+# See https://discourse.llvm.org/t/rfc-future-of-windows-pre-commit-ci/76840
+#windows_projects=$(add-dependencies ${windows_projects_to_test} | sort | uniq)
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ldionne wrote:

You need to set `windows_projects=""` to avoid the unbound variable error.

https://github.com/llvm/llvm-project/pull/81538