fix(preview): update buffer previewer to upstream changes (#2150)

https://github.com/neovim/neovim/pull/19931 removed `_get_hl_from_capture(id)` since captures are now implicitly mapped to highlight groups with the same name.

lua/telescope/builtin/init.lua

@@ -26,11 +26,6 @@
 --- </code>
 ---@brief ]]
 
-if 1 ~= vim.fn.has "nvim-0.7.0" then
-  vim.api.nvim_err_writeln "Telescope.nvim requires at least nvim-0.7.0. See `:h telescope.changelog-1851`"
-  return
-end
-
 local builtin = {}
 
 -- Ref: https://github.com/tjdevries/lazy.nvim