The message is displayed by the Launcher app. On my watch (Bangle2) it's named launchb2.app.js, but it's minified. You can pull an unminified version from github, remove that line, and push it to your watch.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The message is displayed by the Launcher app. On my watch (Bangle2) it's named launchb2.app.js, but it's minified. You can pull an unminified version from github, remove that line, and push it to your watch.