NTP4: Remove some dead code dealing with footer layout
NTP4: Remove some dead code dealing with footer layout

R=estade@chromium.org
BUG=329637
TEST=clearer code

Review URL: https://codereview.chromium.org/1310863002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#344953}

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