Remove fs::canonicalize in walk_tree fix.
Remove fs::canonicalize in walk_tree fix.

* Remove ConfiFile struct, it is not needed without the fs::canonicalize
  call.
* Don't check if the file is in the stash when walking the tree,
  without "canonicalization" it is not necessary.

durka/cargo,rust-lang/cargo,vojtechkral/cargo,sbeckeriv/cargo,tsurai/cargo,rustyhorde/cargo,sbeckeriv/cargo,tsurai/cargo,AndiDog/cargo,achanda/cargo,AndiDog/cargo,achanda/cargo,rust-lang/cargo,AndiDog/cargo,durka/cargo,sbeckeriv/cargo,achanda/cargo,eminence/cargo,durka/cargo,tsurai/cargo,sbeckeriv/cargo,vojtechkral/cargo,rustyhorde/cargo,AndiDog/cargo,rust-lang/cargo,tsurai/cargo,nipunn1313/cargo,eminence/cargo,nipunn1313/cargo,AndiDog/cargo,tshepang/cargo,nipunn1313/cargo,nipunn1313/cargo,tshepang/cargo,vojtechkral/cargo,rust-lang/cargo,tsurai/cargo,eminence/cargo,vojtechkral/cargo,tshepang/cargo,durka/cargo,eminence/cargo,achanda/cargo,rustyhorde/cargo,tshepang/cargo,rustyhorde/cargo