As a local buffer option, 'foldcolumn' is probably set by a filetype plugin, especially because its global default value is 0.
When the drop column appears, find out where it was set via :verbose setlocal foldcolumn? . Then, for example, when ftplugin/cpp.vim , you can put the following in ~/.vim/after/ftplugin/cpp.vim :
:setlocal foldcolumn=0
The after directory allows you to override file-specific parameters without changing the original script.
source share