installer::download: Remove unused create_link_tree.
installer::download: Remove unused create_link_tree.

Change-Id: I2ec409d25ae46580898dda180d991554d89ee501

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