build: remove browsersync snippet log

[crisbeto]

After we disabled the server option in Browsersync, we started getting some extra logs which can be distracting. These changes remove the log.

[devversion]

Did you try whether live-reloading still works?

Also did you notice that it doesn't print out the web server URL anymore?

[crisbeto]

I tried out the livereloading and it still works. Also yes, I noticed that the URL isn't printed, but that's also because we turned off server.

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