Switch non-compiling builders' MB config to "none"
Switch non-compiling builders' MB config to "none"

This is the first CL in a series that switches all non-compiling
builders' MB configs to "none".

BUG=481692
R=dpranke

Review URL: https://codereview.chromium.org/1848163002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#385224}

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