Thank you for answer! But there’s a problem.
All the files are deleted. 
I’d like to make the file deletion criteria a .shp file, is it possible?
For example, if A_a.shp is 100 bytes,
Delete all A.A. (dbf / prj / qpj / shp / shx)
If B_u.shp is 150 bytes,
B_u (dbf / prj / qpj / shp / shx) all safe