ICU4C: Clean up the Visual Studio "clean" target for the makedata project

Description

The makedata project currently deletes individual files inside the ICU4C data build and tmp folders.

This would be much simpler and faster if we just delete the build/tmp folders directly.

Assignee

Jeff Genovy

Reporter

Jeff Genovy

Components

Labels

Reviewer

None

Priority

minor

Time Needed

None

Fix versions

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