layers: nerdtree: remove autocmd for bufEnter and bufNew

[manorit2001]

This causes problems along with the fzf layer and some of the buffer information is lost due to the nerdtree overriding that buffer with it's own, not sure where the origination is from but this seems to fix the problem

[DhruvaG2000]

@rene-descartes2021 @liuchengxu Any comments/ reviews on this would be appreciated. This is a must have feature.
Thanks!

[liuchengxu]

Just to be open, I've moved on from the space-vim config, but I'm happy to merge this if you feel it is useful.

[manorit2001]

Just to be open, I've moved on from the space-vim config, but I'm happy to merge this if you feel it is useful.

Hey, thanks for merging! Though am curious, what have you moved on to now if not this?

[liuchengxu]

I use a short vimrc with a few plugins and config in the daily life. Most of functions I need are now done in the plugin https://github.com/liuchengxu/vim-clap, if anything missing, I'll try to implement them within vim-clap in Rust, rendering them performant and maintenance-friendly :(

vim-clap is no longer a mere fuzzy finder but provides advanced features like tree-sitter highlight, I'm happy with them right now.