Remove required from Gopkg.tom, prune, pin logr

This removes the "required" markings from Gopkg.toml, pins logr and
zapr at specific versions, and prunes non-go.

This should start to reduce our dependency list.

Author: DirectXMan12

Gopkg.lock

@@ -12,22 +12,6 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-# Packages required by users
-# NB(directxman12): be very careful how you word these --
-# dep considers them as a dependency on the package you list
-# meaning that if there's a main.go in the root package
-# (like in apiextensions-apiserver), you'll pull it's deps in.
-required = ["sigs.k8s.io/testing_frameworks/integration",
-            "k8s.io/client-go/plugin/pkg/client/auth",
-            "github.com/spf13/pflag",
-            "github.com/emicklei/go-restful",
-            "github.com/go-openapi/spec",
-            "k8s.io/kube-openapi/pkg/common",
-            "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1",
-            "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset",
-            "github.com/prometheus/client_golang/prometheus",
-            ]
-
 [[constraint]]
   name = "k8s.io/api"
   version = "kubernetes-1.13.4"
@@ -71,11 +55,13 @@ required = ["sigs.k8s.io/testing_frameworks/integration",
 # these are not listed explicitly until we get version tags,
 # since dep doesn't like bare revision dependencies
 
-# [[constraint]]
-#   name = "github.com/go-logr/logr"
-#
-# [[constraint]]
-#   name = "github.com/go-logr/zapr"
+[[constraint]]
+  name = "github.com/go-logr/logr"
+  version = "v0.1.0"
+
+[[constraint]]
+   name = "github.com/go-logr/zapr"
+   version = "v0.1.1"
 
 # For dependency below: Refer to issue https://github.com/golang/dep/issues/1799
 [[override]]
@@ -86,3 +72,4 @@ version="v1.4.7"
 [prune]
   go-tests = true
   unused-packages = true
+  non-go = true