Revert "Add UpsertCommand for Upsercontainer func (#580)"

This reverts commit 1a60d17.

core/v1/kubernetes.go

@@ -111,7 +111,7 @@ func UpsertContainer(containers []core.Container, upsert core.Container) []core.
 }
 
 func MergeContainer(container core.Container, containerTemplate core.Container) core.Container {
-	container.Command = UpsertCommand(container.Command, containerTemplate.Command)
+	container.Command = containerTemplate.Command
 	container.Args = meta.UpsertArgumentList(container.Args, containerTemplate.Args)
 	container.WorkingDir = containerTemplate.WorkingDir
 	container.EnvFrom = containerTemplate.EnvFrom
@@ -352,22 +352,6 @@ func EnsureEnvVarDeleted(vars []core.EnvVar, name string) []core.EnvVar {
 	return vars
 }
 
-func UpsertCommand(commands []string, nc []string) []string {
-	upsert := func(newCommand string) {
-		for _, c := range commands {
-			if c == newCommand {
-				return
-			}
-		}
-		commands = append(commands, newCommand)
-	}
-
-	for _, command := range nc {
-		upsert(command)
-	}
-	return commands
-}
-
 func MergeLocalObjectReferences(l1, l2 []core.LocalObjectReference) []core.LocalObjectReference {
 	result := make([]core.LocalObjectReference, 0, len(l1)+len(l2))
 	m := make(map[string]core.LocalObjectReference)