Remove vim header

No need to set tabstop tons of times, this can be set in your vimrc
file instead.

More disucssion:
http://openstack.10931.n7.nabble.com/Remove-vim-modelines-td21780.html

Change-Id: Iff0d2e4725355800f923a04a1bfcac3003a6abd2
Close-bug: #1229324
Merge "Remove vim header"