build: unshallow not needed with fetch-depth 0
build: unshallow not needed with fetch-depth 0

The unshallow step in the action is replaced now with the
fetch-depth: 0 option on the checkout@v2 action.

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>
(cherry picked from commit c6d8df931f626d988d7d09e6e466db6749c182fc)

rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook