remove unneeded k8s code

There is a lot of unneeded code, k8s is the by far the biggest
dependency in podman. We should remove as much as possible so that we
only have the stuff left that we use.

This is just a quick skim over the code which removes a lot of the
generated code and many packages that are now unused.
I know that this will be impossible to properly review. I will try to
make smaller changes in follow up work.

Right now this reduces about 8 MB in binary size!!!

[NO NEW TESTS NEEDED] Hopefully existing tests will catch any problems.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/go-logr/logr/discard.go

@@ -1,54 +0,0 @@
-/*
-Copyright 2020 The logr Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package logr
-
-// Discard returns a Logger that discards all messages logged to it.  It can be
-// used whenever the caller is not interested in the logs.  Logger instances
-// produced by this function always compare as equal.
-func Discard() Logger {
-	return Logger{
-		level: 0,
-		sink:  discardLogSink{},
-	}
-}
-
-// discardLogSink is a LogSink that discards all messages.
-type discardLogSink struct{}
-
-// Verify that it actually implements the interface
-var _ LogSink = discardLogSink{}
-
-func (l discardLogSink) Init(RuntimeInfo) {
-}
-
-func (l discardLogSink) Enabled(int) bool {
-	return false
-}
-
-func (l discardLogSink) Info(int, string, ...interface{}) {
-}
-
-func (l discardLogSink) Error(error, string, ...interface{}) {
-}
-
-func (l discardLogSink) WithValues(...interface{}) LogSink {
-	return l
-}
-
-func (l discardLogSink) WithName(string) LogSink {
-	return l
-}