Removed old way of building icu data.
merged branch jakzal/merge-fix (PR #9122)

This PR was merged into the 2.3 branch.

Discussion
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Removed old way of building icu data

Somehow these lines leaked from 2.2 while merging #9018. This needs to go to 2.3 and master.

Commits
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714a762 Removed old way of building icu data.