Remove redirectToFragment() from wikibits.js

Replaced by module mediawiki.action.view.redirectToFragment in 1.23
Change Ic10c060c3a2cbab455348e57740fc8abdc66ff9a was deployed with
wmf/1.23wmf10, which is longer ago than 30 days, so there are no longer
cache entries with a call to this function.

Follow-Up: Ic10c060c3a2cbab455348e57740fc8abdc66ff9a
Change-Id: I3b83baa0574a43806d9eb310d5d3e73e40890913
Merge "Remove redirectToFragment() from wikibits.js"