build: Remove footer override from jsduck
build: Remove footer override from jsduck

This obscures useful information like generation timesamp and
JSDuck version. Currently, the jsduck publisher does not use this
because it re-overrides this. However Ie2929535 removes this
re-override and would expose this bug.

Change-Id: I56af8d0fe187842ae3d94e636bfdfbe92e5f5876

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui