Remove TIS-620 from ibm-874_P100-1995

TIS-620 was added to windows-874-2000, but not removed from
ibm-874_P100-1995. This causes it to be alias of an imcompatibiable
charset and fails when the alias charset is cached.

Data file generated with "tools/updateicudata.py".

Bug: 26764224
Change-Id: Id9cc25243614f6301fdb33811064ad7cf9a4beff
4 files changed