Remove unused ThreadHelpBase base
Remove unused ThreadHelpBase base

Change-Id: Ia60e0af495b2141b7ea2e906d94c15c55865eea2

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