Remove generated file rules in make

This is all covered by update-codegen.sh now.

The old `make generated_files` rule still exists, but just prints a
warning.

test/conformance/gen-specsummaries.sh

@@ -23,9 +23,6 @@ KUBE_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")"/../.. && pwd -P)
 cd "${KUBE_ROOT}"
 
 # build ginkgo and e2e.test
-# NOTE: we do *not* use `make WHAT=...` because we do *not* want to be running
-# make generated_files when diffing things (see: hack/verify-conformance-yaml.sh)
-# other update/verify already handle the generated files
 hack/make-rules/build.sh github.com/onsi/ginkgo/v2/ginkgo test/e2e/e2e.test
 
 # dump spec

test/e2e_node/jenkins/conformance/conformance-jenkins.sh

@@ -24,8 +24,6 @@ set -x
 
 . "${1}"
 
-make generated_files
-
 WORKSPACE=${WORKSPACE:-"/tmp/"}
 ARTIFACTS=${WORKSPACE}/_artifacts
 TIMEOUT=${TIMEOUT:-"45m"}

test/integration/ipamperf/README.md

@@ -18,8 +18,6 @@ How to run
 
 ```shell
 # In kubernetes root path
-make generated_files
-
 cd test/integration/ipamperf
 ./test-performance.sh
 ```