Do not trigger on SessionLoadPost autocommand
Do not trigger on SessionLoadPost autocommand

This basically reverts commit 64a3bfd

closes #1444

bling/vim-airline,yzhou61/vim-airline,rchicoli/vim-airline,tschundler/dotfiles,unphased/vim-airline,tschundler/dotfiles,tschundler/dotfiles,chrisbra/vim-airline