Revert "fix: prevent stdout from disappearing in script templates. Fixes

 argoproj#11330 (argoproj#11368)"

This reverts commit 1513e22.

cmd/argoexec/commands/emissary_test.go

@@ -41,21 +41,12 @@ func TestEmissary(t *testing.T) {
 		assert.Equal(t, "1", string(data))
 	})
 	t.Run("Stdout", func(t *testing.T) {
-		_ = os.Remove(varRunArgo + "/ctr/main/stdout")
 		err := run("echo hello")
 		assert.NoError(t, err)
 		data, err := ioutil.ReadFile(varRunArgo + "/ctr/main/stdout")
 		assert.NoError(t, err)
 		assert.Contains(t, string(data), "hello")
 	})
-	t.Run("Sub-process", func(t *testing.T) {
-		_ = os.Remove(varRunArgo + "/ctr/main/stdout")
-		err := run("(sleep 60; echo 'should not wait for sub-process')& echo -n hello")
-		assert.NoError(t, err)
-		data, err := os.ReadFile(varRunArgo + "/ctr/main/stdout")
-		assert.NoError(t, err)
-		assert.Equal(t, "hello", string(data))
-	})
 	t.Run("Combined", func(t *testing.T) {
 		err := run("echo hello > /dev/stderr")
 		assert.NoError(t, err)

workflow/executor/os-specific/command.go

@@ -4,7 +4,6 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"time"
 
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/term"
@@ -17,12 +16,7 @@ func simpleStart(cmd *exec.Cmd) (func(), error) {
 		return nil, err
 	}
 
-	closer := func() {
-		cmd.WaitDelay = 100 * time.Millisecond
-		_ = cmd.Wait()
-	}
-
-	return closer, nil
+	return func() {}, nil
 }
 
 func isTerminal(stdin io.Reader) bool {