zsh: Delete unused parts and bits

Delete:
 - transfer.zsh
 - zsh-async
 - telegram helper functions + completion
 - TERM hack for kitty terminal

.gitignore

@@ -17,7 +17,6 @@
 /.config/vim/.netrwhist
 
 /.config/zsh/.zcompdump
-/.config/zsh/plugins/completion/_msg
 
 /.config/ranger/bookmarks
 /.config/ranger/history