Why people use `find ... |env -i xargs rm -f' instead of `find ...| xargs rm -f'?

[Dai Yuwen <yuwen@micetek.com.cn>]

Hi, Dear all

I often find this line in  shell scripts:

find ... |env -i xargs rm -f

Why people want to clean the environment variables before rm files?

Has  this line
find ...| xargs rm -f
any harm?

Thanks in advance.

Best regards,
dai Yuwen