Remove testify dependency as not used any more
@@ -61,7 +61,6 @@ github.com/shurcooL/sanitized_anchor_name 10ef21a441db47d8b13ebcc5fd2310f636973c
github.com/sirupsen/logrus v1.0.3
github.com/spf13/cobra 34ceca591bcf34a17a8b7bad5b3ce5f9c165bee5
github.com/spf13/pflag 97afa5e7ca8a08a383cb259e06636b5e2cc7897f
-github.com/stretchr/testify 4d4bfba8f1d1027c4fdbe371823030df51419987
github.com/theupdateframework/notary v0.6.1
github.com/tonistiigi/fsutil dea3a0da73aee887fc02142d995be764106ac5e2
github.com/xeipuuv/gojsonpointer e0fe6f68307607d540ed8eac07a342c33fa1b54a
