convert iminsert into a fragment.

autoload/airline/extensions/iminsert.vim

@@ -1,14 +0,0 @@
-" MIT License. Copyright (c) 2013 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
-
-function! airline#extensions#iminsert#get_text()
-  if &iminsert
-    return toupper(get(b:, 'keymap_name', 'lang'))
-  endif
-  return ''
-endfunction
-
-function! airline#extensions#iminsert#init()
-  let g:airline_section_a .= ' '.g:airline_left_alt_sep.' %{airline#extensions#iminsert#get_text()}'
-endfunction
-