Since 5e0f81d2 (Adding utility methods to get recent refs, 2015-08-17),
we have treated references beginning with the prefix "refs/remotes/tags"
as being of type "remote tag".
This is not a namespace that upstream Git uses in practice to denote
remote tags. Instead, tags are automatically namespaced into our local
refs/tags, hence rendering this prefix (and its type) meaningless.
As such, let's remove it so that the 'git lfs migrate' (et. al.)
commands do not get confused about references that do not exist.
Co-authored-by: brian m. carlson <bk2204@github.com>
a7ada95228