Remove unused ThreadHelpBase base
Remove unused ThreadHelpBase base

Change-Id: Id08d2c937a5d41c74852bb14ac726d87853dfc7e

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core