feat(foldtext): allow function() for virtual text components

Author: lcrockett

README.md

@@ -139,20 +139,6 @@ require("origami").inspectLspFolds("special") -- comment & import only
 require("origami").inspectLspFolds("all")
 ```
 
-### Using functions to display virtual text components conditionally
-
-```lua
-require("origami").setup {
-	foldtext = {
-		diagnosticsCount = function()
-			if vim.b.origami_enable_diagnostics_count then
-				return true
-			end
-		end,
-	},
-}
-```
-
 ## Credits
 - [u/marjrohn](https://www.reddit.com/r/neovim/comments/1le6l6x/add_decoration_to_the_folded_lines/)
   for the decorator approach to styling foldtext.