fix: Remove concealcursor configuration

It is not working properly with virt_lines due to
neovim/neovim#27887

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

Author: deathbeam

lua/CopilotChat/chat.lua

@@ -168,7 +168,6 @@ function Chat:open(config)
   vim.wo[self.winnr].linebreak = true
   vim.wo[self.winnr].cursorline = true
   vim.wo[self.winnr].conceallevel = 2
-  vim.wo[self.winnr].concealcursor = 'niv'
   vim.wo[self.winnr].foldlevel = 99
   vim.wo[self.winnr].relativenumber = false
   if config.show_folds then

lua/CopilotChat/debuginfo.lua

@@ -60,7 +60,6 @@ function M.setup()
     vim.wo[win].linebreak = true
     vim.wo[win].cursorline = true
     vim.wo[win].conceallevel = 2
-    vim.wo[win].concealcursor = 'niv'
 
     -- Bind 'q' to close the window
     vim.api.nvim_buf_set_keymap(