[llvm] [Vectorize] Remove Transforms/Vectorize.h (PR #71294)

[Tom Stellard via llvm-commits]

tstellar wrote:

> I happened to notice that there is a reference to the removed file in utils/bazel/llvm-project-overlay/llvm/BUILD.bazel as well. But I guess those bazel files still might be someone elses problem.

The bazel files are usually updated post-commit.

https://github.com/llvm/llvm-project/pull/71294