wikibits deprecations: Do not offer another deprecated function

Since I211593629ca23540dcd5a93b11834155f4f04883 the module
mediawiki.util has deprecated function which was mention here.

Change-Id: I7e4031f859392aeeb61344ceaf78d2b92badd2a8
Merge "wikibits deprecations: Do not offer another deprecated function"