fix regression with ctrlp statusline not changing.

autoload/airline/init.vim

@@ -67,8 +67,6 @@ function! airline#init#bootstrap()
   call airline#parts#define_raw('file', '%f%m')
   call airline#parts#define_raw('ffenc', '%{printf("%s%s",&fenc,strlen(&ff)>0?"[".&ff."]":"")}')
   call airline#parts#define_empty(['hunks', 'branch', 'tagbar', 'syntastic'])
-
-  call airline#extensions#load()
 endfunction
 
 function! airline#init#sections()