Turn off remoting on the Mac GN build to avoid confusion for now.
Turn off remoting on the Mac GN build to avoid confusion for now.

Since it doesn't really work yet, things are slightly cleaner if we
don't try to build anything we don't yet need.

I will reenable what I can once the rest of the port is caught up.

TBR=garykac@chromium.org
BUG=431177
CQ_EXTRA_TRYBOTS=tryserver.chromium.mac:mac_chromium_gn_rel,mac_chromium_gn_dbg

Review URL: https://codereview.chromium.org/1121623004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#327858}

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