Update vendor links

contributors/devel/development.md

@@ -163,11 +163,11 @@ images.
 
 #### Dependency management
 
-Kubernetes uses [`godep`](https://github.com/tools/godep) to manage
+Kubernetes uses [go modules](https://github.com/golang/go/wiki/Modules) to manage
 dependencies.
 
 Developers who need to manage dependencies in the `vendor/` tree should read
-the docs on [using godep to manage dependencies](sig-architecture/godep.md).
+the docs on [using go modules to manage dependencies](/contributors/devel/sig-architecture/vendor.md).
 
 
 ## Build with Bazel/Gazel

contributors/devel/sig-testing/testing.md

@@ -16,7 +16,7 @@
 
 
 This assumes you already read the [development guide](../development.md) to
-install go, godeps, and configure your git client.  All command examples are
+install go and configure your git client.  All command examples are
 relative to the `kubernetes` root directory.
 
 Before sending pull requests you should at least make sure your changes have

contributors/guide/coding-conventions.md

@@ -118,8 +118,8 @@ respectively. Actual application examples belong in /examples.
   - Third-party code
 
     - Go code for normal third-party dependencies is managed using
-[Godep](https://github.com/tools/godep) and is described in the kubernetes
-[godep guide](/contributors/devel/sig-architecture/godep.md)
+[go modules](https://github.com/golang/go/wiki/Modules) and is described in the kubernetes
+[vendoring guide](/contributors/devel/sig-architecture/vendor.md)
 
     - Other third-party code belongs in `/third_party`
       - forked third party Go code goes in `/third_party/forked`