vimrc: remove from puppet

The file went absent a month ago in https://gerrit.wikimedia.org/r/#/c/137340/
It says it was provided by wikimedia-base, but since May 03 2012 the package
doesn't manage the file. See changelog of wikimedia-base_1.00.
Moved the link to environment

Change-Id: I18481630793a9bd33412109268e0bcddcbb5a0c6
Merge "vimrc: remove from puppet" into production