Go mod tidy

Author: jpcoenen

go.sum

@@ -72,12 +72,6 @@ github.com/secrethub/demo-app v0.1.0 h1:HwPPxuiSvx4TBE7Qppzu3A9eHqmsBrIz4Ko8u8pq
 github.com/secrethub/demo-app v0.1.0/go.mod h1:ymjm8+WXTSDTFqsGVBNVmHSnwtZMYi7KptHvpo/fLH4=
 github.com/secrethub/secrethub-cli v0.30.0/go.mod h1:dC0wd40v+iQdV83/0rUrOa01LYq+8Yj2AtJB1vzh2ao=
 github.com/secrethub/secrethub-go v0.21.0/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
-github.com/secrethub/secrethub-go v0.23.0 h1:6NzVGcAJDXeORUc2uZyuaYRCXCawmOKYvhNPP3ASNSM=
-github.com/secrethub/secrethub-go v0.23.0/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
-github.com/secrethub/secrethub-go v0.23.1-0.20191114120141-797aba99690c h1:PJMNIc0Bq02IeCyZKMTxT8TaUDISwX0IAdbgOsfbdWQ=
-github.com/secrethub/secrethub-go v0.23.1-0.20191114120141-797aba99690c/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
-github.com/secrethub/secrethub-go v0.23.1-0.20191202112815-8e4536fffb73 h1:TChbs2D26POGnhQ87QWCg17b3PQukTHPaxgGxAxxTgU=
-github.com/secrethub/secrethub-go v0.23.1-0.20191202112815-8e4536fffb73/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
 github.com/secrethub/secrethub-go v0.25.0 h1:cpYmkLRurrrw6NNE4PagPNDOn7kvY6UMrnnDxrvuI1M=
 github.com/secrethub/secrethub-go v0.25.0/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
 github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=