Description: After the commit 9eb88d78c8bc9e942814eb6fc4fe06a4e5736256 it's possible to replace existed case mapping data by calling ICU functions, until some special exceptions need to be preserved under special conditions. Thus something as casefolding_data.h need to be reviewed and cleaned up many of its source codes. Steps to Reproduce: N/A Actual Results: N/A Expected Results: N/A Reproducible: Always User Profile Reset: No Additional Info: N/A