Go build not needed for go run

[emctl]

Description

As we use the go run app.go command, we do not need to prebuild (i.e go build .).
No code change.

Issue reference

N/A

Checklist

• The quickstart code compiles correctly
• You've tested new builds of the quickstart if you changed quickstart code
• You've updated the quickstart's README if necessary
• If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.

[msfussell]

LGTM