remove duplicate emissary call in executor

As per the initial inline dev comment, argo podspecpatch did not add the
emissary call, and had to be manualy added. This was fixed a couple of
argo versions back. However, as a result executor pod makes double calls
to the executor, which as a consequence also results in superflous logs.

This change removes the additional call to emissary to resolve this.

Signed-off-by: Humair Khan <HumairAK@users.noreply.github.com>

backend/src/v2/driver/driver.go

@@ -387,9 +387,6 @@ func initPodSpecPatch(
 	userCmdArgs = append(userCmdArgs, container.Command...)
 	userCmdArgs = append(userCmdArgs, container.Args...)
 	launcherCmd := []string{
-		// TODO(Bobgy): workaround argo emissary executor bug, after we upgrade to an argo version with the bug fix, we can remove the following line.
-		// Reference: https://github.com/argoproj/argo-workflows/issues/7406
-		"/var/run/argo/argoexec", "emissary", "--",
 		component.KFPLauncherPath,
 		// TODO(Bobgy): no need to pass pipeline_name and run_id, these info can be fetched via pipeline context and pipeline run context which have been created by root DAG driver.
 		"--pipeline_name", pipelineName,