Removed use of File::Find since it's not needed here and it interferes w...

...ith Brownie's ›find‹ keyword.

I stumbled across a tiny issue when using Test::BDD::Cucumber together with the module Brownie.

File::Find is imported but not used in StepFile.pm. I removed the import since the module Brownie::DSL has it’s own function ›find‹.