Merge pull request #30087 from dims/remove-pkill-dependency

Automatic merge from submit-queue

Remove kubelet pkill dependency

Issue #26093 identified pkill as one of the dependencies of kublet
which could be worked around.  Build on the code introduced for pidof
and regexp for the process(es) we need to send a signal to.

Related to #26093

pkg/kubelet/cm/container_manager_linux.go

@@ -527,7 +527,7 @@ func getPidsForProcess(name, pidFile string) ([]int, error) {
 			runtime.HandleError(err)
 		}
 	}
-	return procfs.PidOf(name), nil
+	return procfs.PidOf(name)
 }
 
 // Ensures that the Docker daemon is in the desired container.