cue/encoding: removed unused package.
cue/encoding: removed unused package.

Change-Id: I3e9e2f2a4c872ccde69f47d1a58879bc4c4ff824
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/9383
Reviewed-by: CUE cueckoo <0f32a827c9a5f00281f936ac78b5ef3ba80a954c@gmail.com>
Reviewed-by: Paul Jolly <a027184a55211cd23e3f3094f1fdc728df5e0500@myitcv.org.uk>

cuelang/cue